CMMG
About CMMG
CMMG is an American AR-platform manufacturer based in Boonville, Missouri, producing a full line of rifles, pistols, and components built around their own engineering standards. They are perhaps best known for the Banshee — a compact AR-format pistol and short-barreled rifle series chambered in a wide variety of calibers, including pistol calibers fed by popular handgun magazines. CMMG also developed the Radial Delayed Blowback operating system, an in-house innovation designed to provide smoother cycling and reduce felt recoil in pistol-caliber AR platforms. Their manufacturing is done in-house in Missouri, and the company has grown steadily into a well-regarded full-line AR manufacturer.
Shop CMMG at Arms East
Arms East carries CMMG because this partner builds AR-platform firearms with genuine engineering behind them and offers a product line — especially the Banshee series — that fills a real demand in the market. Browse CMMG’s rifles, pistols, and parts below.
- AR Magazines$16.00Add to cart
CMMG 10-round magazine extension adds reliable capacity to your FN Five-seveN with durable polymer construction and corrosion-resistant spring—simple installation without permanent modification.
- AR Barrels$179.00Add to cart
CMMG’s 16.1″ M4 22LR barrel sub-assembly features 4140 Chrome Moly construction with Salt Bath Nitride finish for superior durability in your custom AR15 build. Purpose-built with 1:16 twist and 22LR Sporting Chamber, it’s threaded 1/2-28 for
- Gun Parts Kits$16.00Add to cart
CMMG 22 ARC Forward Assist Adapter Kit reliably chambers rounds in your 22 ARC conversion with durable glass-filled nylon construction designed for AR-15 platforms.
- Rifle Magazines$22.00Add to cart
CMMG 22 LR conversion magazine in Flat Dark Earth finish delivers reliable rimfire feeding with 10-round capacity, designed specifically for CMMG’s .22 LR conversion systems.
CMMG 22D5B6E Replacement Barrel Kit with Bolt Carrier Group, 22 LR 4.50″ Threaded, Black Nitride Chromoly Steel, Fits AR-15/Mk4
CMMGAdd to cartAR Barrels$286.00Add to cartConvert your AR-15/Mk4 to .22 LR with the CMMG 22D5B6E kit—includes barrel and bolt carrier group with 4.50″ threaded black nitride chromoly steel barrel. Just add a magazine and start shooting.
- AR PistolsOriginal price was: $1,903.00.$1,776.00Current price is: $1,776.00.Add to cart
CMMG DISSENT MK4 in 6mm ARC delivers extended-range capability on a lightweight AR15-platform carbine with a 16.1″ barrel, non-reciprocating charging handle, and adjustable gas block for precision tuning. ZEROED and ready to shoot.
- AR Barrels$210.00Add to cart
CMMG 300 Blackout 16.1 inch barrel sub-assembly with pre-installed M4 barrel extension and factory head spacing for custom AR15 builds. Ready to assemble with all critical components properly fitted.
- AR Barrels$201.00Add to cart
CMMG 300 Blackout upper assembly with 16.1 inch barrel, pre-installed M4 extension and factory headspaced for immediate AR15 integration. Purpose-built for custom builds without guesswork.
- AR BarrelsOriginal price was: $186.00.$174.00Current price is: $174.00.Add to cart
CMMG 300 Blackout 8″ barrel sub-assembly comes pre-headspaced with M4 extension installed, ready to build your custom AR-15 upper. Black Nitride 4140 Chromoly Steel construction in pistol length with medium taper profile.
CMMG 30A650AAB Dissent BR4 *CA Compliant 300 Blackout 10+1 16.10″ Black Nitride Threaded Barrel, Black Armor Cerakote Picatinny Rail Aluminum Receiver, Magpul SGA Black Synthetic Stock
CMMGAdd to cartAR Rifles$1,953.00Add to cartCMMG Dissent BR4 in 300 Blackout delivers versatility across subsonic and supersonic loadings for self-defense, hunting, and target shooting. CA compliant with 16.10″ black nitride threaded barrel, aluminum receiver, full-length Picatinny rail, and Magpul SGA stock.
CMMG 30AB20FAB Banshee MK4 300 Blackout 30+1 12.50″ Black Nitride Medium Taper Threaded Barrel, EML 7″ M-LOK Handguards, Black Armor Cerakote Aluminum Picatinny Rail Receiver, CMMG Zeroed Grips
CMMGAdd to cartAR Pistols$1,493.00Add to cartCMMG Banshee MK4 in .300 Blackout delivers compact, modular performance with a 12.50″ black nitride threaded barrel, EML 7″ M-LOK handguard, and Black Armor Cerakote receiver. Ships with CMMG ZEROED components and 30-round Magp
CMMG 33A380C-AB Dissent MK3 8.6 Blackout 20rd 12.50″ Black Nitride 7075-T6 Aluminum Receiver 11″ Proprietary Handguard CMMG Zeroed Grip
CMMGAdd to cartAR Pistols$2,172.00Add to cartCMMG Dissent MK3 in 8.6 Blackout delivers suppressed performance from a shorter barrel with proven AR10-scaled reliability and .338 caliber effectiveness. Features 12.50″ barrel, 20rd magazine, black nitride 7075-T6 receiver, and 11″ proprietary handguard.
- AR Barrels$200.00Add to cart
CMMG’s 350 Legend 16.1″ barrel sub-assembly features a pre-installed, head-spaced M4 extension in durable 4140CM steel with SBN Finish for your custom Mk4 build.
- AR Magazines$30.00Add to cart
CMMG 350 Legend 20-round replacement magazine delivers reliable feeding for your CMMG AR platform rifle. Built by the pioneering AR manufacturer since 2002, this magazine offers dependable capacity and performance.
- AR Magazines$30.00Add to cart
CMMG 4.6x30mm magazine delivers 40-round capacity in a compact polymer design built specifically for 4.6x30mm centerfire pistols. The sleek black finish and space-efficient profile make it ideal for shooters demanding high round count without bulk.
- AR15 Barrels$458.00Add to cart
CMMG 45 ACP 8 Inch Rifle Barrel with Bolt Kit delivers a complete upper receiver solution for AR-15 platforms, featuring a 4140 chrome moly steel barrel with salt bath nitride finish and matching radial delayed blowback bolt.
- AR Barrels$202.00Add to cart
CMMG 55DE10A barrel sub-assembly features 4140 chromoly construction with salt bath nitride finish for reliable performance and corrosion resistance. Complete upper group component with M4 profile, 16.1″ barrel, carbine-length gas system, and 1/2″-28 TPI muzzle thread for AR-15 builders.
- AR Magazines$16.00Add to cart
CMMG’s advanced polymer construction and anti-tilt follower deliver reliable 30-round 5.56 NATO performance optimized for AR-15 platforms in harsh conditions. The Flat Dark Earth finish and raised dot stippling provide secure grip and modern aesthetics.
- Handgun Magazines$16.00Add to cart
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I need the actual product description or spec sheet for the **CMMG 5.56 NATO MK4 AR15 30 Round Black Magazine** to follow your rules—specifically Rule 4, which forbids me from adding any facts not explicitly stated in the source.
Please provide the manufacturer’s description or product details, and I’ll deliver the 1–2 sentence excerpt.
- AR Bolt Carrier Groups$427.00Add to cart
CMMG’s patented Radial Delayed Blowback system reduces felt recoil while maintaining full compatibility with standard AR-15 uppers and lowers. This 5-inch 5.7x28mm barrel and BCG kit delivers less recoil than conventional blowback designs.
