{"id":130750,"date":"2020-07-05T14:09:42","date_gmt":"2020-07-05T18:09:42","guid":{"rendered":"https:\/\/www.gunsamerica.com\/digest\/?p=130750"},"modified":"2026-10-18T19:11:37","modified_gmt":"2026-10-19T00:11:37","slug":"daniel-defense-m4a1-review","status":"publish","type":"post","link":"https:\/\/gunsamerica.com\/digest\/daniel-defense-m4a1-review\/","title":{"rendered":"Daniel Defense M4A1 Review: The SOPMOD Block II Rifle"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\"><strong>The Daniel Defense M4A1 is the commercial version of the upper my Special Forces unit was issued in the SOPMOD Block II upgrades: a 14.5 inch cold hammer forged barrel, a free floating RIS II quad rail and a pinned and welded flash hider. The commercial rifle is true to the issued gun where it can be, it ran period correct magazines without a hiccup, and it shot tighter than I expected from a mil-spec trigger.<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Still in production?<\/strong> Yes. As of October 2026, Daniel Defense lists the M4A1 with the RIS II rail and the M4A1 RIII with an M-LOK rail and ambidextrous lower.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Specs and the verdict come first, then my service and range notes.<\/p>\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-daniel-defense-m4a1-specs\" class=\"clickTracking\" campaign=\"daniel-defense-m4a1-review\" title=\"Daniel Defense M4A1 Review: The SOPMOD Block II Rifle\" data-level=\"2\">Daniel Defense M4A1 Specs<\/a><ul><li><a href=\"#h-verdict\" target=\"_blank\" class=\"clickTracking\" campaign=\"daniel-defense-m4a1-review\" title=\"Daniel Defense M4A1 Review: The SOPMOD Block II Rifle\" data-level=\"3\">Verdict<\/a><\/li><\/ul><\/li><li><a href=\"#h-faq\" class=\"clickTracking\" campaign=\"daniel-defense-m4a1-review\" title=\"Daniel Defense M4A1 Review: The SOPMOD Block II Rifle\" data-level=\"2\">FAQ<\/a><ul><li><a href=\"#h-what-barrel-length-is-the-daniel-defense-m4a1\" target=\"_blank\" class=\"clickTracking\" campaign=\"daniel-defense-m4a1-review\" title=\"Daniel Defense M4A1 Review: The SOPMOD Block II Rifle\" data-level=\"3\">What barrel length is the Daniel Defense M4A1?<\/a><\/li><li><a href=\"#h-is-the-daniel-defense-m4a1-still-made\" target=\"_blank\" class=\"clickTracking\" campaign=\"daniel-defense-m4a1-review\" title=\"Daniel Defense M4A1 Review: The SOPMOD Block II Rifle\" data-level=\"3\">Is the Daniel Defense M4A1 still made?<\/a><\/li><li><a href=\"#h-what-is-the-difference-between-the-m4a1-and-m4a1-riii\" target=\"_blank\" class=\"clickTracking\" campaign=\"daniel-defense-m4a1-review\" title=\"Daniel Defense M4A1 Review: The SOPMOD Block II Rifle\" data-level=\"3\">What is the difference between the M4A1 and M4A1 RIII?<\/a><\/li><\/ul><\/li><\/ul><\/div>\n\n\n\n<h2 id=\"h-daniel-defense-m4a1-specs\" class=\"wp-block-heading\">Daniel Defense M4A1 Specs<\/h2>\n\n\n\n<figure class=\"wp-block-table\"><table><thead><tr><th><\/th><th>Daniel Defense M4A1<\/th><\/tr><\/thead><tbody><tr><td>Caliber<\/td><td>5.56 NATO<\/td><\/tr><tr><td>Barrel<\/td><td>14.5 in cold hammer forged, M4 profile, 1:7 twist<\/td><\/tr><tr><td>Muzzle<\/td><td>Pinned and welded DD flash suppressor<\/td><\/tr><tr><td>Gas system<\/td><td>Carbine (per Daniel Defense)<\/td><\/tr><tr><td>Handguard<\/td><td>RIS II quad rail, free floating<\/td><\/tr><tr><td>Charging handle<\/td><td>GRIP-N-RIP, ambidextrous<\/td><\/tr><tr><td>Trigger<\/td><td>Mil-spec<\/td><\/tr><tr><td>Weight<\/td><td>6.74 lb (Daniel Defense)<\/td><\/tr><tr><td>Current listing<\/td><td>From $2,599 on danieldefense.com, October 2026<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h3 id=\"h-verdict\" class=\"wp-block-heading\">Verdict<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Good:<\/strong> faithful to the issued SOPMOD upper, very accurate barrel, durable rail, ambi charging handle and safety, DD furniture.<\/li>\n<li><strong>Know this:<\/strong> the quad rail is heavy by modern standards, the welded flash hider cannot be removed, and the trigger is mil-spec.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">For another DD rifle I tested, see our <a href=\"https:\/\/gunsamerica.com\/digest\/daniel-defense-3-gun-dominator-m4v7-pro-5-56-full-review\/\" target=\"_blank\" class=\"clickTracking\" campaign=\"daniel-defense-m4a1-review\" title=\"Daniel Defense M4A1 Review: The SOPMOD Block II Rifle\">Daniel Defense M4V7 Pro review<\/a>.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">More DD M4A1 coverage: <a href=\"https:\/\/gunsamerica.com\/digest\/daniel-defense-m4a1-mil-spec\/\" target=\"_blank\" class=\"clickTracking\" campaign=\"daniel-defense-m4a1-review\" title=\"Daniel Defense M4A1 Review: The SOPMOD Block II Rifle\">M4A1 Mil-Spec+<\/a> and the <a href=\"https:\/\/gunsamerica.com\/digest\/all-new-daniel-defense-riii-rifle-series-shot-show-2022\/\" target=\"_blank\" class=\"clickTracking\" campaign=\"daniel-defense-m4a1-review\" title=\"Daniel Defense M4A1 Review: The SOPMOD Block II Rifle\">RIII series launch<\/a>.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong><a href=\"https:\/\/gunsamerica.com\/search?keyword=Daniel+Defense+M4A1\" campaign=\"dd-m4a1\" target=\"_blank\" class=\"clickTracking\">&#x1f6d2; Check Current Price for Daniel Defense M4A1 on GunsAmerica<\/a><\/strong><\/p>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/gunsamerica.com\/digest\/wp-content\/uploads\/2020\/06\/IMG_0874-1024x683.jpeg\" alt=\"Daniel Defense M4A1, GWOT War Horse\"\/><figcaption class=\"wp-element-caption\">DD M4A1, SOF standard issue<\/figcaption><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">It isn\u2019t often that a review gun is something I have an emotional attachment too, but this one is an exception. The Daniel Defense M4A1 holds a special place in my heart, as I am sure is true for a great many Veterans. Why you ask? Because we carried one in war. You know you are getting old when a replica of your battle rifle is on the market. But then, replica isn\u2019t quite the right word. Since Daniel Defense actually built our guns.<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/gunsamerica.com\/digest\/wp-content\/uploads\/2020\/06\/IMG_0857-1024x683.jpeg\" alt=\"Daniel Defense M4A1, GWOT War Horse\"\/><figcaption class=\"wp-element-caption\">More than one firebase has been defended just like this<\/figcaption><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">I can still remember the day we got our DD uppers as part of the SOPMOD 2 block of upgrades. Daniel Defense was a much smaller company back then, and I have still no idea how they managed to win this particular contract. My guess is that somebody competent on our side did their homework for once, and found exactly what was needed. Even in Special Operations, weapon procurement can be a goat rodeo. But a few years into the GWOT, we were also gaining some leverage to get better tools. Prior to this, our primary rifle had been the same M4 issued to the entire Army. Albeit with an auto switch instead of a burst setting, a difference so small as to be insignificant.<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/gunsamerica.com\/digest\/wp-content\/uploads\/2020\/06\/IMG_0891-683x1024.jpeg\" alt=\"Daniel Defense M4A1, GWOT War Horse\"\/><figcaption class=\"wp-element-caption\">Period correct EOTECH and VTAC sling<\/figcaption><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">From the moment we put them on, the difference in the Daniel Defense upper was obvious. Part of which you have to look at in historical context. This first major improvement is the RIS II handguard, which is 12.25 inches long. Probably shocking to our younger audience, but just Picatinny rail attachments themselves are not that old. They were not common until the late 90\u2019s, and into the early part of the war were only 6 inches long. The leverage gained by being able to put your hand out further was HUGE for the time.<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/gunsamerica.com\/digest\/wp-content\/uploads\/2020\/06\/IMG_0887-1024x683.jpeg\" alt=\"Daniel Defense M4A1, GWOT War Horse\"\/><figcaption class=\"wp-element-caption\">RIS II rail attachment<\/figcaption><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">The old rails also interfaced with the standard M4 delta ring rear, and A frame style front sight post. The new Daniel Defense upper was the first free floating barrel we were issued, which contributed to its accuracy. Also gone was the A frame front sight. Now an A frame is very durable, no question. And you can run optics with one and be successful, we did it for years. But we also shouldn\u2019t deny that having a huge front sight post in the way of your optic is like shooting with a pinky finger in your line of vision. Having it removed was like upgrading from regular TV to HD. Heady stuff in the mid 2000\u2019s.<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/gunsamerica.com\/digest\/wp-content\/uploads\/2020\/06\/IMG_0882-1024x683.jpeg\" alt=\"Daniel Defense M4A1, GWOT War Horse\"\/><figcaption class=\"wp-element-caption\">Grip N Rip charging handle<\/figcaption><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">And oh Lord that accuracy. Daniel Defense makes its own cold hammer forged barrels in Black Creek, Georgia. The new Daniel Defense uppers were far more accurate than our service issue guns.<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/gunsamerica.com\/digest\/wp-content\/uploads\/2020\/06\/IMG_0883-1024x683.jpeg\" alt=\"Daniel Defense M4A1, GWOT War Horse\"\/><figcaption class=\"wp-element-caption\">Alt view<\/figcaption><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">I wasn\u2019t smart enough back then to slap a Leupold scope on the DD uppers to see exactly how tight they were. I was in a door kicker unit, so I never tested them with anything other than an EOTECH. But even with just red dots, the accuracy difference was like night and day. We were in love with the Double D\u2019s, which is not probably the first time a Soldier has said that.<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/gunsamerica.com\/digest\/wp-content\/uploads\/2020\/06\/IMG_0888-1024x683.jpeg\" alt=\"Daniel Defense M4A1, GWOT War Horse\"\/><figcaption class=\"wp-element-caption\">The view through the EOTECH<\/figcaption><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">The new upper was eventually issued widely across SOCOM. Ranger Battalion, Special Forces, MARSOC, the Squeels, and whatever the Air Force calls its guys this week. It became one of the best known guns of the War on Terror, with service from Tal Afar to Kandahar to Damascus. A fitting tribute to the men who carried it, I was really happy to see Daniel Defense release a commercial version. So how does the version you can buy compare to the version that fought the jihad?<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/gunsamerica.com\/digest\/wp-content\/uploads\/2020\/06\/IMG_0893-683x1024.jpeg\" alt=\"Daniel Defense M4A1, GWOT War Horse\"\/><figcaption class=\"wp-element-caption\">flash hider top<\/figcaption><\/figure>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/gunsamerica.com\/digest\/wp-content\/uploads\/2020\/06\/IMG_0892-683x1024.jpeg\" alt=\"Daniel Defense M4A1, GWOT War Horse\"\/><figcaption class=\"wp-element-caption\">flash hider bottom<\/figcaption><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Remarkably well, in my opinion. The barrel is 14.5 inches, which is true of the issued one as well. ( A 10.5 inch was also issued, and is also available for purchase.) DD pinned and welded the flash hider. This does mean that you can\u2019t twist off the flash hider and run a suppressor, but for this gun I don\u2019t find that a huge problem. More period correct would also have been a Surefire 3 prong hider, which came with our new suppressors around the same time. But the Daniel Defense model is a good one, and does a fine job of completing the look.<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/gunsamerica.com\/digest\/wp-content\/uploads\/2020\/06\/IMG_0880-1024x683.jpeg\" alt=\"Daniel Defense M4A1, GWOT War Horse\"\/><figcaption class=\"wp-element-caption\">ambi selector lever and grip<\/figcaption><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">The handguard is true to spec, including the dark earth coloring. It has a long service record and makes the rifle instantly recognizable. While full length quad rails might not be the most modern feel now, it did represent a great leap forward at the time. It is functional and comfortable, if a bit on the heavy side.<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/gunsamerica.com\/digest\/wp-content\/uploads\/2020\/06\/IMG_0881-1024x683.jpeg\" alt=\"Daniel Defense M4A1, GWOT War Horse\"\/><figcaption class=\"wp-element-caption\">DD rail with a KAC rail section on top. Difference in length was a huge plus<\/figcaption><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">The other minor change to the upper receiver is the new DD charging handle. Called the GRIP-N-RIP, it is fully ambi. It is beefed up from a mil spec model, with a rubbery type texture to the handle. It also has a an anti gas feature, which directs gasses away when using a suppressor. Not helpful on this model, but the charging handle is a nice upgrade.<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/gunsamerica.com\/digest\/wp-content\/uploads\/2020\/06\/IMG_0884-1024x683.jpeg\" alt=\"Daniel Defense M4A1, GWOT War Horse\"\/><figcaption class=\"wp-element-caption\">Original Gangster as it gets<\/figcaption><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">To fully complete the period feel, I had to put an EOTECH 512 on the rifle. This would be the double A model that was the SOF standard back then. I absolutely love this optic. I had one all through training, and in all my operational time in Special Forces. Not only was this door kicker optic of choice, but it wasn\u2019t uncommon to see them on 50 cal machine guns, or even the Carl Gustav recoilless rifle. My Bravo taught me that one!<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/gunsamerica.com\/digest\/wp-content\/uploads\/2020\/06\/IMG_0878-1024x683.jpeg\" alt=\"Daniel Defense M4A1, GWOT War Horse\"\/><figcaption class=\"wp-element-caption\">keeping it fed<\/figcaption><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">I also reached out to our friends at Gun Mag Warehouse for period-correct magazines. While the SureFeed brand name is new, the magazines are made by Okay Industries. Which has been a military supplier for decades. As expected, they ran in the DD without so much as a hiccup.<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/gunsamerica.com\/digest\/wp-content\/uploads\/2020\/06\/IMG_0879-1024x683.jpeg\" alt=\"Daniel Defense M4A1, GWOT War Horse\"\/><figcaption class=\"wp-element-caption\">Daniel Defense brand buttstock<\/figcaption><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">The lower could not replicate the select fire issued one, but DD did the best they could here. The safety is also ambi, and what I would call historically accurate as well. The right side is a full-size lever, with a big beefy screw holding it in place. I wouldn\u2019t swear to it, but it looks a faithful recreation of the ones lefty\u2019s would have used at the time of issue. The trigger is also mil-spec, which I don\u2019t love. While it is also period correct to have that, most Daniel Defense rifles ship with a Geisselle. We did get those later, but while this upper was still the standard issue. Rounding out the package is Daniel Defense furniture, which I like enough to have bought and put on other guns in the past.<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/gunsamerica.com\/digest\/wp-content\/uploads\/2020\/06\/DD-accuracy-1024x576.jpg\" alt=\"Daniel Defense M4A1, GWOT War Horse\"\/><figcaption class=\"wp-element-caption\">Accuracy testing with Accutac Bipod, Leupold MK5, and Hornady 75gr Match<\/figcaption><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">What kind of accuracy do you expect from what is billed as a service rifle? I wasn\u2019t quite sure how this was going to go. I remember the DD\u2019s being WAY more accurate than the big Army uppers they replaced, but I couldn\u2019t put a true measurement on that. I also know Daniel Defense barrels in their other guns to be very accurate, and I wondered whether DD would have cheaped out a little on a \u201cmilitary-grade\u201d model.<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/gunsamerica.com\/digest\/wp-content\/uploads\/2020\/06\/IMG_0873-683x1024.jpeg\" alt=\"Daniel Defense M4A1, GWOT War Horse\"\/><figcaption class=\"wp-element-caption\">A 5 round group<\/figcaption><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">And I would have thought wrong. The M4A1 shot as well as the other DD rifles I have tested, and there may be more accuracy in this gun than I got out of it. I am still recovering from an injury, so I am shooting left-handed. And I did the accuracy testing with the mil-spec trigger and lower, no special fixed stock ringer to squeeze every millimeter of accuracy out.<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/gunsamerica.com\/digest\/wp-content\/uploads\/2020\/06\/IMG_0870-2-1024x683.jpeg\" alt=\"Daniel Defense M4A1, GWOT War Horse\"\/><figcaption class=\"wp-element-caption\">A 3 round group<\/figcaption><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">I tested with Hornady Match 75 grain and a Leupold MK5. I won\u2019t BS you, I quit one string at three rounds because I was shocked to see them all touching in the scope. I should have gone for 5, but I knew my odds of tossing one with my current shooting status was high. That is outstanding accuracy from an AR-15.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">All in all, this is a fantastic gun. I can\u2019t even look at it without getting warm fuzzies remembering riding hot breeches all over Baghdad in the middle of the night. Or riding the skids of a Blackhawk on the way to go hand out some vengeance. This gun is a fitting tribute to the men who carried it, and all the stories they could tell. The M4A1 gets my recommendation.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong><em>Buy and Sell on GunsAmerica!<\/em><\/strong><\/p>\n\n\n\n<h2 id=\"h-faq\" class=\"wp-block-heading\">FAQ<\/h2>\n\n\n\n<h3 id=\"h-what-barrel-length-is-the-daniel-defense-m4a1\" class=\"wp-block-heading\">What barrel length is the Daniel Defense M4A1?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">14.5 inches, with a pinned and welded flash suppressor.<\/p>\n\n\n\n<h3 id=\"h-is-the-daniel-defense-m4a1-still-made\" class=\"wp-block-heading\">Is the Daniel Defense M4A1 still made?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Yes. Daniel Defense lists the M4A1 and the M4A1 RIII as of October 2026.<\/p>\n\n\n\n<h3 id=\"h-what-is-the-difference-between-the-m4a1-and-m4a1-riii\" class=\"wp-block-heading\">What is the difference between the M4A1 and M4A1 RIII?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">The M4A1 uses the RIS II Picatinny quad rail; the RIII uses an M-LOK RIS III rail and a fully ambidextrous lower.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>The Daniel Defense M4A1 is the commercial version of the upper my Special Forces unit was issued in the SOPMOD Block II upgrades: a 14.5 inch cold hammer forged barrel, a free floating RIS II quad rail and a pinned and welded flash hider. The commercial rifle is true to the issued gun where it [&hellip;]<\/p>\n","protected":false},"author":36,"featured_media":130769,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_specdata_upc":"","_specdata_placement":"","footnotes":""},"categories":[1],"tags":[132,179,102,2556],"featured":[],"hunt365":[],"class_list":["post-130750","post","type-post","status-publish","format-standard","has-post-thumbnail","category-uncategorized","tag-buzz","tag-daniel-defense","tag-feature-articles","tag-m4a1"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v28.8 (Yoast SEO v28.8) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>Daniel Defense M4A1 Review: SOPMOD Block II Rifle Tested<\/title>\n<meta name=\"description\" content=\"Daniel Defense M4A1 review from a former SF soldier who carried the issued upper: RIS II rail, 14.5 inch CHF barrel, range notes, specs and verdict.\" \/>\n<meta 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