{"id":218342,"date":"2025-08-03T10:14:00","date_gmt":"2025-08-03T15:14:00","guid":{"rendered":"https:\/\/gunsamerica.com\/digest\/?p=218342"},"modified":"2025-09-29T08:53:51","modified_gmt":"2025-09-29T13:53:51","slug":"940-pro-tactical-spx-shotgun-gunsamerica-review","status":"publish","type":"post","link":"https:\/\/gunsamerica.com\/digest\/940-pro-tactical-spx-shotgun-gunsamerica-review\/","title":{"rendered":"Castle Defense With Mossberg 940 Pro Tactical SPX: Full Review"},"content":{"rendered":"\n<p class=\"wp-block-yoast-seo-estimated-reading-time yoast-reading-time__wrapper\"><span class=\"yoast-reading-time__icon\"><svg aria-hidden=\"true\" focusable=\"false\" data-icon=\"clock\" width=\"20\" height=\"20\" fill=\"none\" stroke=\"currentColor\" style=\"display:inline-block;vertical-align:-0.1em\" role=\"img\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" viewBox=\"0 0 24 24\"><path stroke-linecap=\"round\" stroke-linejoin=\"round\" stroke-width=\"2\" d=\"M12 8v4l3 3m6-3a9 9 0 11-18 0 9 9 0 0118 0z\"><\/path><\/svg><\/span><span class=\"yoast-reading-time__spacer\" style=\"display:inline-block;width:1em\"><\/span><span class=\"yoast-reading-time__descriptive-text\">Estimated reading time: <\/span><span class=\"yoast-reading-time__reading-time\">25<\/span><span class=\"yoast-reading-time__time-unit\"> minutes<\/span><\/p>\n\n\n\n<p>Would you defend your house with a shotgun? After spending a week and hundreds of rounds training with the purpose-built <a href=\"https:\/\/gunsamerica.com\/search?keyword=mossberg%20940%20pro%20tactical%20spx\" target=\"_blank\" class=\"clickTracking\" campaign=\"940-pro-tactical-spx-shotgun-gunsamerica-review\" title=\"Castle Defense With Mossberg 940 Pro Tactical SPX: Full Review\">Mossberg 940 Pro Tactical SPX<\/a>, I would! I&#8217;ve put this gun to the test in Arizona at Gunsite Academy during their 260 Defensive Shotgun class. This class featured high-round-count strings of fire and unconventional shooting positions in a hot, dusty desert environment. With the capability of the 940 Pro Tactical SPX thoroughly tested, I&#8217;m glad to report my experience and break it down in a full review of the gun.<\/p>\n\n\n\n<p>Six different 940 Pro Tactical SPX models differ based on Cerakote color, magazine capacity, and whether an optic is included. The exact model I have is the <a href=\"https:\/\/www.mossberg.com\/940-pro-tactical-spx-holosun-micro-dot-combo-85179.html\" target=\"_blank\" class=\"clickTracking\" campaign=\"940-pro-tactical-spx-shotgun-gunsamerica-review\" title=\"Castle Defense With Mossberg 940 Pro Tactical SPX: Full Review\" target=\"_blank\" rel=\"noreferrer noopener\">940 Pro Tactical SPX &#8211; Holosun Micro Dot Combo<\/a>, which is the most pricey option with a red dot and 7-round magazine capacity. Because it comes with a Holosun HS407K X2 installed, it has an MSRP of $1,371.00. Now, let&#8217;s get into more details about the gun.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"768\" src=\"https:\/\/gunsamerica.com\/digest\/wp-content\/uploads\/2025\/07\/IMG_5418-1024x768.jpeg\" alt=\"A black shotgun lays on a pile of red shotgun shells on the ground.940 Pro Tactical SPX\" class=\"wp-image-218388\"\/><figcaption class=\"wp-element-caption\">I put the 940 Pro Tactical SPX through its paces during a defensive shotgun class in Arizona. <\/figcaption><\/figure>\n\n\n\n<div class=\"wp-block-yoast-seo-table-of-contents yoast-table-of-contents\"><h2>Table of contents<\/h2><ul><li><a href=\"#h-what-sets-the-940-pro-tactical-spx-apart-from-other-mossberg-940s\" class=\"clickTracking\" campaign=\"940-pro-tactical-spx-shotgun-gunsamerica-review\" title=\"Castle Defense With Mossberg 940 Pro Tactical SPX: Full Review\" data-level=\"2\">What Sets the 940 Pro Tactical SPX Apart from Other Mossberg 940s<\/a><\/li><li><a href=\"#h-advantage-over-other-shotgun-operating-systems\" class=\"clickTracking\" campaign=\"940-pro-tactical-spx-shotgun-gunsamerica-review\" title=\"Castle Defense With Mossberg 940 Pro Tactical SPX: Full Review\" data-level=\"2\">Advantage Over Other Shotgun Operating Systems<\/a><\/li><li><a href=\"#h-overview-of-the-940-pro-tactical-spx\" class=\"clickTracking\" campaign=\"940-pro-tactical-spx-shotgun-gunsamerica-review\" title=\"Castle Defense With Mossberg 940 Pro Tactical SPX: Full Review\" data-level=\"2\">Overview Of The 940 Pro Tactical SPX<\/a><ul><li><a href=\"#h-receiver-and-stock-features\" target=\"_blank\" class=\"clickTracking\" campaign=\"940-pro-tactical-spx-shotgun-gunsamerica-review\" title=\"Castle Defense With Mossberg 940 Pro Tactical SPX: Full Review\" data-level=\"3\">Receiver and Stock Features<\/a><\/li><\/ul><\/li><li><a href=\"#h-training-with-the-940-pro-tactical-spx\" class=\"clickTracking\" campaign=\"940-pro-tactical-spx-shotgun-gunsamerica-review\" title=\"Castle Defense With Mossberg 940 Pro Tactical SPX: Full Review\" data-level=\"2\">Training With The 940 Pro Tactical SPX<\/a><ul><li><a href=\"#h-shooting-positions-and-skills\" target=\"_blank\" class=\"clickTracking\" campaign=\"940-pro-tactical-spx-shotgun-gunsamerica-review\" title=\"Castle Defense With Mossberg 940 Pro Tactical SPX: Full Review\" data-level=\"3\">Shooting Positions and Skills<\/a><\/li><\/ul><\/li><li><a href=\"#h-key-features-of-the-940-pro-tactical-spx\" class=\"clickTracking\" campaign=\"940-pro-tactical-spx-shotgun-gunsamerica-review\" title=\"Castle Defense With Mossberg 940 Pro Tactical SPX: Full Review\" data-level=\"2\">Key Features of the 940 Pro Tactical SPX<\/a><\/li><li><a href=\"#h-specifications\" class=\"clickTracking\" campaign=\"940-pro-tactical-spx-shotgun-gunsamerica-review\" title=\"Castle Defense With Mossberg 940 Pro Tactical SPX: Full Review\" data-level=\"2\">Specifications<\/a><\/li><li><a href=\"#h-red-dot-optics-are-changing-the-shotgun-game\" class=\"clickTracking\" campaign=\"940-pro-tactical-spx-shotgun-gunsamerica-review\" title=\"Castle Defense With Mossberg 940 Pro Tactical SPX: Full Review\" data-level=\"2\">Red Dot Optics Are Changing the Shotgun Game<\/a><ul><li><a href=\"#h-mounting-red-dots\" target=\"_blank\" class=\"clickTracking\" campaign=\"940-pro-tactical-spx-shotgun-gunsamerica-review\" title=\"Castle Defense With Mossberg 940 Pro Tactical SPX: Full Review\" data-level=\"3\">Mounting Red Dots<\/a><\/li><\/ul><\/li><li><a href=\"#h-holosun-hs407k-x2\" class=\"clickTracking\" campaign=\"940-pro-tactical-spx-shotgun-gunsamerica-review\" title=\"Castle Defense With Mossberg 940 Pro Tactical SPX: Full Review\" data-level=\"2\">Holosun HS407K X2<\/a><\/li><li><a href=\"#h-closing-thoughts-on-the-940-pro-tactical-spx\" class=\"clickTracking\" campaign=\"940-pro-tactical-spx-shotgun-gunsamerica-review\" title=\"Castle Defense With Mossberg 940 Pro Tactical SPX: Full Review\" data-level=\"2\">Closing Thoughts on the 940 Pro Tactical SPX<\/a><\/li><\/ul><\/div>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-what-sets-the-940-pro-tactical-spx-apart-from-other-mossberg-940s\">What Sets the 940 Pro Tactical SPX Apart from Other Mossberg 940s<\/h2>\n\n\n\n<p>The 940 Pro Tactical SPX is a more refined version of the Mossberg 940 that you already know and love. The SPX designation means &#8220;Special Purpose Tactical&#8221;, which can be compared to a high-end trim level in a car. The 940 is always a 940, but the SPX designation denotes a few extra quality-of-life improvements that are specifically added for law enforcement and defensive use. Functionally, the main improvement involves the gas system. Special coatings on critical components allow the SPX to go much longer between cleanings with perfect reliability. <\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"477\" src=\"https:\/\/gunsamerica.com\/digest\/wp-content\/uploads\/2025\/07\/IMG_5684-1024x477.jpeg\" alt=\"940 Pro Tactical SPX completely disassembled and laid out on the table to showcase the parts. \" class=\"wp-image-218389\"\/><figcaption class=\"wp-element-caption\">After 500 rounds, I disassembled my 940 Pro Tactical SPX and thoroughly cleaned everything. The gas system certainly had carbon, plastic (from wads), and other buildup, but it kept cycling like a champ. And I expected it to be dirtier than it was. This shows how well Mossberg designed this gun.<\/figcaption><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-advantage-over-other-shotgun-operating-systems\">Advantage Over Other Shotgun Operating Systems<\/h2>\n\n\n\n<p>The 940 Pro Tactical SPX is a gas-operated shotgun that relies on a vented piston and spring-loaded pressure-regulating gas block. This is paired with advanced coatings and debris-diverting geometry within the gas system. The gas piston, mag tube, hammer, and sear all have a super slick nickel boron coating. This is a recipe for reliability with basically all shell types, in all environments, and it extends round counts between necessary cleanings. Mossberg claims that this system will stay clean enough to run reliably to 1,500 rounds before needing to be cleaned!<\/p>\n\n\n\n<p>Because this shotgun has a regulating gas system, it will feed almost any conventional shotgun shell. I say almost because there&#8217;s probably something out there that won&#8217;t run, but I haven&#8217;t found it yet. And no, mini shells are not conventional, and it does not run these. I put low brass 2 3\/4&#8243; #8 birdshot, 2 3\/4&#8243; 00 Buck, and 3&#8243; slugs through my gun with 100% reliability. Also, unlike cheaper recoil-operated designs, this gas system will run the shotgun even if it is fired unsupported from an unconventional shooting position. I think this is ideal in a self-defense shotgun because you can find yourself in unimaginable situations.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"768\" src=\"https:\/\/gunsamerica.com\/digest\/wp-content\/uploads\/2025\/07\/IMG_5694-1024x768.jpeg\" alt=\"A shotgun lays in the gravel with shotgun shells strapped to its side. \" class=\"wp-image-218390\"\/><figcaption class=\"wp-element-caption\">The 940 Pro Tactical SPX comes with a Vang Comp 6-Shotshell carrier system.<\/figcaption><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-overview-of-the-940-pro-tactical-spx\">Overview Of The 940 Pro Tactical SPX<\/h2>\n\n\n\n<p>Other accoutrements of the 940 Pro Tactical SPX include an 18.5&#8243; barrel that accepts Accu-Choke choke tubes. The 940 Pro Tactical SPX features an interchangeable fiber-optic front sight with protective wings and a removable ghost ring rear sight that can be swapped out for a red dot optic. The receiver directly accepts RMSc footprint micro-dots, or you can use the included mounting plates to attach RMR, Docter, or Leupold optics\u2014no extra purchases required. And if you prefer a different setup, the receiver is also drilled and tapped for a rail, giving you virtually unlimited optic options.<\/p>\n\n\n\n<p>The forend offers flush cup attachment points on either side, plus M-LOK on both sides and the bottom. You&#8217;ll also find M-LOK on either side of the barrel clamp. If you\u2019d rather not use the ample M-LOK slots or flush cup attachment points, the 940 Pro Tactical SPX also includes a swivel sling stud on the buttstock and another on the barrel clamp. Both of these can be positioned on either the right or left side. The forend also has an integrated heat shield that is fantastic at keeping your hands safe when the barrel gets hot during long strings of fire.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"768\" src=\"https:\/\/gunsamerica.com\/digest\/wp-content\/uploads\/2025\/07\/IMG_5408-1024x768.jpeg\" alt=\"Closeup of the muzzle end of a 940 Pro Tactical SPX\" class=\"wp-image-218385\"\/><figcaption class=\"wp-element-caption\">This shotgun has a barrel clamp that keeps the magazine extension in place, but it also provides M-LOK mounting sites on either side. Also, note how the handguard covers up the barrel, acting as a heat shield and keeping your hands safe from burns.<\/figcaption><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-receiver-and-stock-features\">Receiver and Stock Features<\/h3>\n\n\n\n<p>At the receiver of this shotgun, you&#8217;ll find a 6-Shotshell Carrier by Vang Comp Systems attached to the left side via a hook-and-loop card attachment system. You&#8217;ll also find an oversized bolt release and charging handle, both designed for easy use with gloves or in low-visibility conditions. Other features that are useful for limited visibility are the cocking indicator at the front of the trigger guard, a uniquely shaped follower, and an enlarged and beveled loading port. The last feature to note on the receiver is the tang-mounted safety, chosen for its easy operation from both strong-hand and weak-hand shooting positions.<\/p>\n\n\n\n<p>The buttstock on the 940 Pro Tactical SPX has flush cup fittings on both sides and a swivel sling stud for mounting slings. You can adjust the length of pull by installing spacers under the buttpad. These spacers vary in thickness for full customizability and can add up to 1.75&#8243; to the length-of-pull (LOP). The LOP starts at 12.5&#8243; without any spacers and extends to 14.25&#8243; when all spacers are installed.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-training-with-the-940-pro-tactical-spx\">Training With The 940 Pro Tactical SPX<\/h2>\n\n\n\n<p>I spent a week in Arizona at <a href=\"https:\/\/www.gunsite.com\/\" target=\"_blank\" class=\"clickTracking\" campaign=\"940-pro-tactical-spx-shotgun-gunsamerica-review\" title=\"Castle Defense With Mossberg 940 Pro Tactical SPX: Full Review\" target=\"_blank\" rel=\"noreferrer noopener\">Gunsite Academy<\/a> taking their <a href=\"https:\/\/www.gunsite.com\/classes\/260-shotgun-class\/\" target=\"_blank\" class=\"clickTracking\" campaign=\"940-pro-tactical-spx-shotgun-gunsamerica-review\" title=\"Castle Defense With Mossberg 940 Pro Tactical SPX: Full Review\" target=\"_blank\" rel=\"noreferrer noopener\">260 Defensive Shotgun class<\/a> with the Mossberg 940 Pro Tactical SPX. At this class, I shot in challenging positions, rolled around in the dirt, ran back and forth across the range, patterned my shotgun, and shot various targets with birdshot, buckshot, and slugs. I faced challenging temperatures, rain, and desert dust that infiltrated every component of the gun. In just three days, I recall putting 500 rounds through this gun without a single hiccup.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"612\" src=\"https:\/\/gunsamerica.com\/digest\/wp-content\/uploads\/2025\/07\/IMG_5380-1024x612.jpeg\" alt=\"A man in a Hawaiian shirt is shooting the 940 Pro Tactical SPX from beside a van.\" class=\"wp-image-218382\"\/><figcaption class=\"wp-element-caption\">During my class, we practiced various self-defense scenarios. This included addressing threats outside of and inside the home.<\/figcaption><\/figure>\n\n\n\n<p>On the first day, I patterned the 940 Pro Tactical SPX with buckshot. I did this at 7, 15, and 25 yards. The buckshot I was using was Federal Premium 9-Pellet 00 Buck with FlightControl Wad. According to the instructors at Gunsite, who have seen everything, the 8-pellet version of this is the best buckshot load for a tight pattern and high consistency. Still, at 7 yards, the pattern left a single slug-sized hole on the paper target. At 15 yards, the pattern remained impressively tight at about 4 inches. At 25 yards, the pattern opened up ever so slightly to approximately 6-7 inches.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"923\" src=\"https:\/\/gunsamerica.com\/digest\/wp-content\/uploads\/2025\/07\/IMG_5377-1024x923.jpeg\" alt=\"Closeup of a target that has been shot by the 940 Pro Tactical SPX at various distances.\" class=\"wp-image-218381\"\/><figcaption class=\"wp-element-caption\">This target shows how the 940 Pro Tactical SPX patterned at 7 yards (top), 15 yards (middle), and 25 yards (bottom) using Federal 8-Pellet 00 Buck with Flight Control wad. Note that this is with the cylinder choke that comes in all 940 Pro Tactical SPX shotguns. <\/figcaption><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-shooting-positions-and-skills\">Shooting Positions and Skills<\/h3>\n\n\n\n<p>We also spent a lot of time practicing low ready, high ready, and close ready shooting positions. In the class, we shot around, through, and over barricades. As we progressed, we trained in CQB tactics and practiced clearing a shoothouse room by room. Once we were comfortable with this shotgun&#8217;s manual of arms, we practiced loading select ammunition types from our gun-mounted shotgun card upon command. In the end, we shot many, many drills, including the Dozier and Bill Drill. Oh, and I almost forgot that we did many drills in various positions on the ground; crawling, kneeling, hunched over sideways, and more.<\/p>\n\n\n\n<p>I left Gunsite Academy with a lot of new and improved skills. Though I felt that my biggest takeaway from this experience was my newfound respect for the true versatility of the shotgun in general. And, of course, I was incredibly impressed with the reliability and speed of the Mossberg 940 Pro Tactical SPX. The gas system proved to run extremely clean; I don&#8217;t know of many other <a href=\"https:\/\/gunsamerica.com\/firearms\/shotguns\/semi-auto\" target=\"_blank\" class=\"clickTracking\" campaign=\"940-pro-tactical-spx-shotgun-gunsamerica-review\" title=\"Castle Defense With Mossberg 940 Pro Tactical SPX: Full Review\">semi-auto shotguns<\/a> that could have chewed through 500 rounds in that desert environment with no cleaning. And because of the low recoil impulse, I was getting these rounds on target faster and more accurately than I ever thought possible.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"768\" src=\"https:\/\/gunsamerica.com\/digest\/wp-content\/uploads\/2025\/07\/IMG_5397-1024x768.jpeg\" alt=\"A man lays on his back, shooting a shotgun over low cover. 940 Pro Tactical SPX\" class=\"wp-image-218383\"\/><figcaption class=\"wp-element-caption\">In hindsight, wearing shorts was a bad idea, regardless of how hot it was in the desert of Arizona in June.<\/figcaption><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-key-features-of-the-940-pro-tactical-spx\">Key Features of the 940 Pro Tactical SPX<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Optic-Ready (Shield RMSc footprint)\n<ul class=\"wp-block-list\">\n<li>Includes 3 additional adapter plates \n<ul class=\"wp-block-list\">\n<li>RMR<\/li>\n\n\n\n<li>Docter<\/li>\n\n\n\n<li>Leupold Delta Point<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li>Mounted Holosun HS407k <a href=\"https:\/\/gunsamerica.com\/digest\/vortex-venom-enclosed-micro-red-dot-review\/\" target=\"_blank\" class=\"clickTracking\" campaign=\"940-pro-tactical-spx-shotgun-gunsamerica-review\" title=\"Castle Defense With Mossberg 940 Pro Tactical SPX: Full Review\" data-wpil-monitor-id=\"240\">Micro Red Dot<\/a><\/li>\n\n\n\n<li>New forend design\n<ul class=\"wp-block-list\">\n<li>Integrated heat shield<\/li>\n\n\n\n<li>Multiple M-Lok slots for accessories<\/li>\n\n\n\n<li>QD (Quick Detach) sling ports<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li>Vang Comp 6-shotshell carrier system<\/li>\n\n\n\n<li>Clean-running gas-vent system for reliable cycling<\/li>\n\n\n\n<li>Oversized ergonomic controls:\n<ul class=\"wp-block-list\">\n<li>Safety<\/li>\n\n\n\n<li>Bolt release<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li>Adjustable length of pull (LOP) stock with QD ports<\/li>\n\n\n\n<li>Drilled and tapped the receiver for optics<\/li>\n\n\n\n<li>Capable of being &#8220;ghost loaded&#8221; &#8211; operating with an extra round on the lifter<\/li>\n<\/ul>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"768\" src=\"https:\/\/gunsamerica.com\/digest\/wp-content\/uploads\/2025\/07\/IMG_5699-1024x768.jpeg\" alt=\"the choke tube is removed from a shotgun barrel and is being showcased on a tan mat, next to the gun. \" class=\"wp-image-218394\"\/><figcaption class=\"wp-element-caption\">The 940 Pro Tactical SPX takes Mossberg&#8217;s Accu-Choke style of chokes. This gun comes with a cylinder choke, but can be swapped to whatever fits your preferences.<\/figcaption><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-specifications\">Specifications<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Model: 940 Pro Tactical SPX &#8211; Holosun Combo<\/li>\n\n\n\n<li>SKU: 85179<\/li>\n\n\n\n<li>Gauge: 12 Gauge<\/li>\n\n\n\n<li>Action: Semi-Automatic<\/li>\n\n\n\n<li>Chamber Size: 3&#8243;<\/li>\n\n\n\n<li>Usage: Tactical \/ Security<\/li>\n\n\n\n<li>Barrel Length: 18.5&#8243;<\/li>\n\n\n\n<li>Barrel Finish: Matte Blue<\/li>\n\n\n\n<li>Choke System: Accu-Choke (Cylinder Bore Choke Installed)<\/li>\n\n\n\n<li>Capacity: 7+1<\/li>\n\n\n\n<li>Overall Length: 37&#8243;<\/li>\n\n\n\n<li>Length of Pull: 12.5&#8243; to 14.25&#8243; (Adjustable)<\/li>\n\n\n\n<li>Sights: Fiber Optic Front Sight + Holosun HS407k<\/li>\n\n\n\n<li>Stock: Synthetic, Adjustable LOP, Cast, Drop (Black)<\/li>\n\n\n\n<li>Weight: 7.25 lbs<\/li>\n\n\n\n<li>MSRP: $1,371.00<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-red-dot-optics-are-changing-the-shotgun-game\">Red Dot Optics Are Changing the Shotgun Game<\/h2>\n\n\n\n<p>Using a red dot optic on a shotgun is quickly becoming popular. This is because aiming with them is precise and intuitive. Still, not all mounting interfaces are created equal. On the <a href=\"https:\/\/www.mossberg.com\/940-pro-tactical-spx-holosun-micro-dot-combo-85179.html\" target=\"_blank\" class=\"clickTracking\" campaign=\"940-pro-tactical-spx-shotgun-gunsamerica-review\" title=\"Castle Defense With Mossberg 940 Pro Tactical SPX: Full Review\" target=\"_blank\" rel=\"noreferrer noopener\">940 Pro Tactical SPX &#8211; Holosun Micro Dot Combo<\/a>, which is what I have, the rear sight is replaced with a <a href=\"https:\/\/holosun.com\/products\/pistol-sights\/407\/hs407k-x2.html\" target=\"_blank\" class=\"clickTracking\" campaign=\"940-pro-tactical-spx-shotgun-gunsamerica-review\" title=\"Castle Defense With Mossberg 940 Pro Tactical SPX: Full Review\" target=\"_blank\" rel=\"noreferrer noopener\">Holosun HS4<\/a>07K X2. This dot is as low to the bore as it can get, so it points much the same as the original iron sights. This red dot also has built-in rear irons that you can use to co-witness with the dot. Shooting slugs at extended ranges or hitting flying clays is just as easy\u2014and you can do it with both eyes open.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"768\" src=\"https:\/\/gunsamerica.com\/digest\/wp-content\/uploads\/2025\/07\/IMG_5413-1024x768.jpeg\" alt=\"looking down the sights of a shotgun with a red dot optic mounted. \" class=\"wp-image-218387\"\/><figcaption class=\"wp-element-caption\">The HS407K X2 has rear irons built into it, so you can co-witness these with the red dot, or fall back on them if the dot were to somehow fail. <\/figcaption><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-mounting-red-dots\">Mounting Red Dots<\/h3>\n\n\n\n<p>That said, most shotguns use a receiver-mounted Picatinny rail to mount red dots. This is an inferior mounting method because it forces the shooter to lift their face from the buttstock, preventing a proper cheek weld. Yes, some shotguns (including this one) have shims that can be used to alter the rise or drop of the comb, but you have a limit on the amount of rise that can be shimmed into a shotgun. I have 0.250&#8243; of rise shimmed on my 940 Pro Tactical SPX, which is perfect for me to maintain a proper cheek weld while having an ideal sight picture.<\/p>\n\n\n\n<p>The <a href=\"https:\/\/holosun.com\/products\/pistol-sights\/407\/hs407k-x2.html\" target=\"_blank\" class=\"clickTracking\" campaign=\"940-pro-tactical-spx-shotgun-gunsamerica-review\" title=\"Castle Defense With Mossberg 940 Pro Tactical SPX: Full Review\" target=\"_blank\" rel=\"noreferrer noopener\">Holosun HS407K X2<\/a> is a great pairing for this shotgun because of its small and snag-free size and shape. The 6 MOA dot has a battery life of up to 50,000 hours, which is over 5.5 years! It also carries an IP67 waterproof rating, meaning you can submerge it up to 1 meter deep for 30 minutes. Certainly not for diving, but this more than adequately covers rain or accidental water exposures. I&#8217;ll let you check out the rest of the specifications and features on this dot below:<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-holosun-hs407k-x2\">Holosun HS407K X2<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Key Features\n<ul class=\"wp-block-list\">\n<li>6 MOA dot reticle<\/li>\n\n\n\n<li>Battery life up to 50,000 hours (at brightness setting 6)<\/li>\n\n\n\n<li>12 brightness settings:\n<ul class=\"wp-block-list\">\n<li>10 daylight (DL)<\/li>\n\n\n\n<li>2 night vision (NV) compatible<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li>Convenient tray battery compartment<\/li>\n\n\n\n<li>Parallax-free with unlimited eye relief<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li>Physical Specifications\n<ul class=\"wp-block-list\">\n<li>Window size: 0.58 x 0.77 in<\/li>\n\n\n\n<li>Dimensions: 1.6 x 0.98 x 0.95 in<\/li>\n\n\n\n<li>Weight: 1 oz<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li>Mechanical Specifications\n<ul class=\"wp-block-list\">\n<li>Housing material: 7075-T6 aluminum<\/li>\n\n\n\n<li>Surface finish: Anodized<\/li>\n\n\n\n<li>Adjustment per click: 1 MOA<\/li>\n\n\n\n<li>Windage &amp; Elevation travel range: \u00b130 MOA<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li>Environmental Specifications\n<ul class=\"wp-block-list\">\n<li>Storage temperature: -40\u00b0C to 70\u00b0C<\/li>\n\n\n\n<li>Operating temperature: -30\u00b0C to 60\u00b0C<\/li>\n\n\n\n<li>Water resistance: IP67 (submersible)<\/li>\n\n\n\n<li>Vibration resistance: 5000G<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"768\" src=\"https:\/\/gunsamerica.com\/digest\/wp-content\/uploads\/2025\/07\/IMG_5695-1024x768.jpeg\" alt=\"Closeup of a semi-auto shotgun reveiver and a red-dot.\" class=\"wp-image-218391\"\/><figcaption class=\"wp-element-caption\">The Holosun HS407K X2 is directly mounted to the receiver of the 940 Pro Tactical SPX, keeping it low to the bore and securely attached. <\/figcaption><\/figure>\n\n\n\n<p><strong>READ MORE HERE: <a href=\"https:\/\/gunsamerica.com\/digest\/optic-ready-multicam-mossberg-940-jm-pro-review-w-video\/\" target=\"_blank\" class=\"clickTracking\" campaign=\"940-pro-tactical-spx-shotgun-gunsamerica-review\" title=\"Castle Defense With Mossberg 940 Pro Tactical SPX: Full Review\" target=\"_blank\" rel=\"noreferrer noopener\">Optic-Ready Multicam Mossberg 940 JM Pro Review [w\/Video]<\/a><\/strong><\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-closing-thoughts-on-the-940-pro-tactical-spx\">Closing Thoughts on the 940 Pro Tactical SPX<\/h2>\n\n\n\n<p>The 940 Pro Tactical SPX &#8211; Holosun Micro Dot Combo is, hands down, the best American-made tactical shotgun. This gun is reliable, robust, and extremely customizable for fit and function. It swings and points intuitively and is lightweight. The optics mounting system leads the market because it mounts the red dot low to the bore. And there are multiple models available that differ in Cerakote color, round capacity, and optics. On top of all that, this shotgun is extremely soft-shooting because of the advanced gas operating system. I highly recommend the 940 Pro Tactical SPX as a defensive\/tactical shotgun. As the ultimate testament, I will even be using mine to protect my home.<\/p>\n\n\n\n<p>learn more about the <a href=\"https:\/\/www.mossberg.com\/940-pro-tactical-spx-holosun-micro-dot-combo-85179.html\" target=\"_blank\" class=\"clickTracking\" campaign=\"940-pro-tactical-spx-shotgun-gunsamerica-review\" title=\"Castle Defense With Mossberg 940 Pro Tactical SPX: Full Review\">940 Pro Tactical SPX &#8211; Holosun Micro Dot Combo here<\/a>.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"768\" src=\"https:\/\/gunsamerica.com\/digest\/wp-content\/uploads\/2025\/07\/IMG_5698-1024x768.jpeg\" alt=\"The 940 Pro Tactical SPX is propped up between a black walnut bed and nightstand.\" class=\"wp-image-218393\"\/><figcaption class=\"wp-element-caption\">Mossberg&#8217;s 940 Pro Tactical SPX &#8211; Holosun Micro Dot Combo has gained my trust to the point where I will be using it to protect my family and my home. <\/figcaption><\/figure>\n\n\n\n<p class=\"has-text-align-left\" style=\"font-size:24px\"><strong><em>*** <a href=\"https:\/\/gunsamerica.com\" target=\"_blank\" class=\"clickTracking\" campaign=\"940-pro-tactical-spx-shotgun-gunsamerica-review\" title=\"Castle Defense With Mossberg 940 Pro Tactical SPX: Full Review\" target=\"_blank\" rel=\"noreferrer noopener\">Buy and Sell on GunsAmerica!<\/a> ***<\/em><\/strong><\/p>\n","protected":false},"excerpt":{"rendered":"<p>The 940 Pro Tactical SPX is a more refined version of the Mossberg 940 that you already know and love. <\/p>\n","protected":false},"author":93,"featured_media":218388,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_specdata_upc":"","_specdata_placement":"","footnotes":""},"categories":[694,892,1211,38],"tags":[102,108,3689,182,628],"featured":[],"hunt365":[],"class_list":{"0":"post-218342","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-gun-reviews","8":"category-columns-home-defense","9":"category-riley-baxter","10":"category-gun-reviews-shotguns","11":"tag-feature-articles","12":"tag-guns","13":"tag-headline","14":"tag-mossberg","15":"tag-shotgun"},"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v27.3 (Yoast SEO v27.3) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>Castle Defense With Mossberg 940 Pro Tactical SPX: Full Review<\/title>\n<meta name=\"description\" content=\"Learn about the Mossberg 940 Pro Tactical SPX shotgun and decide if it&#039;s a good fit to protect you and your home.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/gunsamerica.com\/digest\/940-pro-tactical-spx-shotgun-gunsamerica-review\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Castle Defense With Mossberg 940 Pro Tactical SPX: Full Review\" \/>\n<meta property=\"og:description\" content=\"The 940 Pro Tactical SPX is a more refined version of the Mossberg 940 that you already know and love.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/gunsamerica.com\/digest\/940-pro-tactical-spx-shotgun-gunsamerica-review\/\" \/>\n<meta property=\"og:site_name\" content=\"Gun Reviews and News | GunsAmerica.com\/Digest\" \/>\n<meta property=\"article:publisher\" 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