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.
- 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.
