{"id":67268,"date":"2017-01-06T11:32:19","date_gmt":"2017-01-06T16:32:19","guid":{"rendered":"https:\/\/www.gunsamerica.com\/blog\/?p=67268"},"modified":"2017-01-06T11:32:19","modified_gmt":"2023-08-20T14:24:54","slug":"gemtechs-gmt-300blk-suppressor-300-blackout-rifles-full-review","status":"publish","type":"post","link":"https:\/\/gunsamerica.com\/digest\/gemtechs-gmt-300blk-suppressor-300-blackout-rifles-full-review\/","title":{"rendered":"Gemtech’s GMT-300BLK Suppressor for 300 Blackout Rifles – Full Review"},"content":{"rendered":"
\"The<\/a>

The Gemtech GMT-300BLK is made specifically for 300 Blackout rifles.<\/p><\/div>\n

To learn more, visit\u00a0https:\/\/gemtech.com\/gmt-300blk.html<\/a>.<\/p>\n

To purchase a Gemtech suppressor on GunsAmerica.com, click this link: https:\/\/www.gunsamerica.com\/Search.aspx?T=Gemtech<\/a>.<\/p>\n

Suppressing a 300 Blackout rifle presents a unique opportunity because the exact performance attributes are known in advance. Allow me to explain.<\/p>\n

If you\u2019re trying to make a generic .30-caliber rifle suppressor, you\u2019ve got to plan for a wide range of potential pressure and general abuse. You don\u2019t know whether, and how frequently, the user will be shooting any type of ammunition all the way up to 300 Win Mag. To get specific, let\u2019s consider the pressures involved with various loads that one might fire through a .30 caliber rifle silencer.<\/p>\n

At the low end, you\u2019ll find cartridges like .22LR. That operates at mellow handgun cartridge pressures with a SAAMI maximum of 24,000 psi. Moving up the scale, consider that .30-06 has a maximum SAAMI pressure of 60,000 psi while .300 Winchester Magnum goes up to 64,000 and .308 Winchester tops out at 62,000 psi. On the other hand, 300 Blackout operates at significantly lower pressures, with a SAAMI maximum of 55,000 psi, the same as .223 Remington. Depending on whose numbers you use, the 5.56mm NATO variant tops out at over 62,000 psi.<\/p>\n

\"If<\/a>

If you’re only going to use it on a 300 Blackout rifle, you don’t need a larger and heavier .30 caliber suppressor like the SilencerCo Specwar shown above.<\/p><\/div>\n

What\u2019s all this mean? As with .223 rifle suppressors, the top end of the abuse range for a dedicated 300 Blackout can is known, so manufacturers can engineer a silencer as small and light as possible, using materials that will handle a known level of pressure. Being non-caliber specific, most .30 caliber rifle suppressors have to be overbuilt.<\/p>\n

The folks at Silencer Shop<\/a> recently loaned me such a purpose-built suppressor for testing. The Gemtech GMT-300BLK suppressor<\/a> is, as the name implies, designed specifically for use with the 300 AAC Blackout cartridge. While you can use it on any 300 Blackout rifle with a 7.5-inch or longer barrel, it was really built for short barrel rifle configurations. It\u2019s small and light as far as centerfire rifle silencers go, so it\u2019s a great fit for short, light, and handy carbines. It\u2019s rated for full-auto operation, but the factory manual clarifies \u201cfull-auto\u201d as 4-8 round bursts every three to six seconds. Even if you can afford the ammo, don\u2019t make a habit of full magazine dumps in rapid succession.<\/p>\n

\"The<\/a>

The interior is machined from a solid hunk of Titanium.<\/p><\/div>\n

The GMT-300BLK is made from Titanium for light weight and strength. When you pick the Gemtech up you can really tell the difference the material makes. I shot it side by side with a SilencerCo SWR Specwar 7.62. The Specwar 762 model weighs in at 24 ounces and is a full nine inches long and 1.5 inches in diameter. The Gemtech GMT-300BLK is just over half the weight at 14 ounces. It\u2019s also 2.3 inches shorter at just 6.7 inches. The diameter is the same at 1.5 inches. The size and weight differences are not just apparent on paper; you feel that reduced weight and size when you mount the Gemtech. Speaking of mounting, it\u2019s a direct-thread only mount with a 5\/8×24 tpi pattern. Given its designed use, it\u2019s intended to be a “mount forever” type of suppressor, so the lack of any muzzle devices or quick attach\/detach mounting options is irrelevant.<\/p>\n

\"The<\/a>

The compact size and light weight are a big deal. The Gemtech is not much over half the weight of this Specwar 762 and over two inches shorter.<\/p><\/div>\n

The GMT-300BLK is user-serviceable for cleaning. That\u2019s a good thing because, while supersonic centerfire rifle models are self-cleaning from the heat and pressure, heavy subsonic use can leave junk like carbon and lead (if you shoot unjacketed bullets) that needs to be removed. The outer tube unscrews from the direct thread mounting base to expose a G-Core baffle. The G-Core system is a single-piece baffle design, so the whole interior is a solid hunk of metal. There\u2019s a nifty trick to remove the outer tube from the baffle stack in the event parts get fused together by carbon deposits. The muzzle has a square opening which is designed to accommodate a 3\/8-inch socket wrench so you can apply some leverage with a socket wrench to get the outer tube off if required.<\/p>\n

\"You<\/a>

You can use a socket driver to loosen the exterior tube from the G-Core baffle if you need to.<\/p><\/div>\n

Without a suppressor, the folks at Silencer Shop<\/a> have established baseline measurements of 208 and 220-grain subsonic 300 Blackout loads from a 9-inch barrel in the 157 to 162-decibel range. Assume the factory suppression numbers are accurate, and that puts the overall sound pressure figures in the 130 dB range when shooting subsonic. Technically, that\u2019s hearing safe, but repetition matters, so if you\u2019re going to be shooting more than a couple of shots, use hearing protection anyway. That\u2019s a good rule to use with any silencer.<\/p>\n

To see how the GMT-300BLK compared to a general purpose rifle suppressor, I used it on two different rifles in a side by side comparison with the SilencerCo SWR Specwar 762. I used a Daniel Defense DDM4v5 300 Blackout rifle with a 16-inch barrel and an Aero Precision eight-inch barrel 300 Blackout upper for the test rifles.<\/p>\n

\"The<\/a>

The GMT-300BLK made a great addition to this eight-inch Aero Precision upper.<\/p><\/div>\n

I shot both subsonic and supersonic ammo from both configurations with a variety of ammo including Sig Sauer 125-grain Match Supersonic, Sig Sauer 220-grain Match Subsonic, and American Eagle 220-grain Suppressor. With both super and subsonic ammo, I noticed a distinct tonal difference between the Specwar and Gemtech suppressors. The larger Specwar produced more of a “hissing whoosh” sound (how\u2019s that for a description?) while the Gemtech exhibited more of a muted \u201cthud.\u201d The Specwar sounded quieter to the naked ear with all gun and ammo combinations, but then again, its supposed to. It\u2019s got a factory rating of 119 dB for subsonic ammunition. With that said, the noise level was fine with both super and subsonic loads, even from the eight-inch short barrel configuration.<\/p>\n

With both super and subsonic ammo, I did some quick and dirty testing with and without the Gemtech mounted to see how the point of impact changed, if at all, between suppressed mounted and un-mounted shooting. In the 50-yard bay where I was testing, I could detect no significant difference in the impact point with either of the test guns. Perhaps the light weight offered less interference with the barrel. In any case, I didn\u2019t have to change the zero on my optics when adding the silencer.<\/p>\n

\"The<\/a>

The GMT-300BLK uses a direct thread mount only.<\/p><\/div>\n

The big standout feature of the Gemtech GMT-300BLK is the compact size and amazingly light weight. If you\u2019re going to build a compact 300 Blackout rifle, this makes a great addition. It\u2019ll keep the overall length acceptable and remain easy to handle offhand. Oh, and there\u2019s one more thing I failed to mention. The outer tube is finished with black Cerakote, so you get a reduced infrared heat signature. You know, in case you have to take on that alien heat vision eyeballs from the movie Predator. To the naked ear, the overall perceived volume is a little louder than the much larger and heavier .30 caliber suppressors, but for dedicated 300 Blackout use it’s a tradeoff I’ll happily make.<\/p>\n

To learn more, visit\u00a0https:\/\/gemtech.com\/gmt-300blk.html<\/a>.<\/p>\n

To purchase a Gemtech suppressor on GunsAmerica.com, click this link: https:\/\/www.gunsamerica.com\/Search.aspx?T=Gemtech<\/a>.<\/p>\n","protected":false},"excerpt":{"rendered":"

The Gemtech GMT-300BLK suppressor is, as the name implies, designed specifically for use with the 300 AAC Blackout cartridge. While you can use it on any 300 Blackout rifle with a 7.5-inch or longer barrel, it was really built for short barrel rifle configurations. It\u2019s small and light as far as centerfire rifle silencers go, so it\u2019s a great fit for short, light, and handy carbines. Take a look for a full review of this really interesting suppressor.<\/p>\n","protected":false},"author":25,"featured_media":67271,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_specdata_upc":"","_specdata_placement":"","footnotes":""},"categories":[7,109,882,209],"tags":[110,132,102,219,69,620],"featured":[],"hunt365":[],"class_list":{"0":"post-67268","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-gunsamerica-authors","8":"category-gear-reviews","9":"category-gear-suppressors","10":"category-tom-mchale","11":"tag-accessories-2","12":"tag-buzz","13":"tag-feature-articles","14":"tag-gemtech","15":"tag-suppressor","16":"tag-tactical"},"yoast_head":"\nGemtech's GMT-300BLK Suppressor for 300 Blackout Rifles - Full Review<\/title>\n<meta name=\"description\" content=\"Gemtech's GMT-300BLK Suppressor for 300 Blackout Rifles - Full Review - Authors\" \/>\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\/gemtechs-gmt-300blk-suppressor-300-blackout-rifles-full-review\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Gemtech's GMT-300BLK Suppressor for 300 Blackout Rifles - Full Review\" \/>\n<meta property=\"og:description\" content=\"The Gemtech GMT-300BLK suppressor is, as the name implies, designed specifically for use with the 300 AAC Blackout cartridge. While you can use it on any 300 Blackout rifle with a 7.5-inch or longer barrel, it was really built for short barrel rifle configurations. It\u2019s small and light as far as centerfire rifle silencers go, so it\u2019s a great fit for short, light, and handy carbines. Take a look for a full review of this really interesting suppressor.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/gunsamerica.com\/digest\/gemtechs-gmt-300blk-suppressor-300-blackout-rifles-full-review\/\" \/>\n<meta property=\"og:site_name\" content=\"Gun Reviews and News | GunsAmerica.com\/Digest\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/gunsamerica\" \/>\n<meta property=\"article:author\" content=\"http:\/\/facebook.com\/mygunculture\" \/>\n<meta property=\"article:published_time\" content=\"2017-01-06T16:32:19+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2023-08-20T14:24:54+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/gunsamerica.com\/digest\/wp-content\/uploads\/2016\/12\/Gemtech-GMT-300BLK-Suppressor-6.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"1200\" \/>\n\t<meta property=\"og:image:height\" content=\"664\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"author\" content=\"Tom McHale\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:creator\" content=\"@http:\/\/twitter.com\/mygunculture\" \/>\n<meta name=\"twitter:site\" content=\"@gunsamerica\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"Tom McHale\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"7 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\\\/\\\/gunsamerica.com\\\/digest\\\/gemtechs-gmt-300blk-suppressor-300-blackout-rifles-full-review\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/gunsamerica.com\\\/digest\\\/gemtechs-gmt-300blk-suppressor-300-blackout-rifles-full-review\\\/\"},\"author\":{\"name\":\"Tom McHale\",\"@id\":\"https:\\\/\\\/gunsamerica.com\\\/digest\\\/#\\\/schema\\\/person\\\/0d300d007eac411171a5b1eff424c4de\"},\"headline\":\"Gemtech’s GMT-300BLK Suppressor for 300 Blackout Rifles – Full Review\",\"datePublished\":\"2017-01-06T16:32:19+00:00\",\"dateModified\":\"2023-08-20T14:24:54+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\\\/\\\/gunsamerica.com\\\/digest\\\/gemtechs-gmt-300blk-suppressor-300-blackout-rifles-full-review\\\/\"},\"wordCount\":1435,\"commentCount\":3,\"publisher\":{\"@id\":\"https:\\\/\\\/gunsamerica.com\\\/digest\\\/#organization\"},\"image\":{\"@id\":\"https:\\\/\\\/gunsamerica.com\\\/digest\\\/gemtechs-gmt-300blk-suppressor-300-blackout-rifles-full-review\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/gunsamerica.com\\\/digest\\\/wp-content\\\/uploads\\\/2016\\\/12\\\/Gemtech-GMT-300BLK-Suppressor-6.jpg\",\"keywords\":[\"Accessories\",\"Buzz\",\"Feature Articles\",\"Gemtech\",\"Suppressor\",\"Tactical\"],\"articleSection\":[\"Authors\",\"Gear Reviews\",\"Suppressors\",\"Tom McHale\"],\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"CommentAction\",\"name\":\"Comment\",\"target\":[\"https:\\\/\\\/gunsamerica.com\\\/digest\\\/gemtechs-gmt-300blk-suppressor-300-blackout-rifles-full-review\\\/#respond\"]}]},{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/gunsamerica.com\\\/digest\\\/gemtechs-gmt-300blk-suppressor-300-blackout-rifles-full-review\\\/\",\"url\":\"https:\\\/\\\/gunsamerica.com\\\/digest\\\/gemtechs-gmt-300blk-suppressor-300-blackout-rifles-full-review\\\/\",\"name\":\"Gemtech's GMT-300BLK Suppressor for 300 Blackout Rifles - 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