Receivers

The S&W M&P15 Complete AR-15 Upper is what you need to complete your AR-15 Rifle. This upper is chambered in .223 Rem/5.56 NATO, the barrel is 16 in length, and the barrel has a 1/8 twist. This upper comes with a 10 free float quad rail, Magpul MBUS...

Inspired by the success of the original MkG, the MkGs lower receiver is designed to accept either 9mm or .40 S&W Glock and SGM magazines. Features include an integrated trigger guard, last round bolt hold open, oversized magazine release, flared magwell,...

CMMG offers a variety of lower platforms that are optimized for use with our 9mm Radial Delayed Blowback uppers. The Mk17, being the latest iteration of pistol mag lower platforms, utilizes Sig Sauer P320/M17/M18 pattern magazines. Whether you already...

Warthogs design is inspired by the A-10 Warthog aircraft, along with some particularly memorable hog hunts our team has enjoyed.

Explore what's possible with 6.5 Creedmoor with the 24'' ENDEAVOR Mk3 Upper Group. Dedicated to long-range performance above all else, this upper utilizes a nitride-finished 416 stainless steel barrel to better harness the potential of 6.5 Creedmoor...

KD4 Upper Group with twist rate designed for 77 grain Black Hills ammunition. Upper Group features: BCM SS410 16'' Mid Length Upper Receiver Group w/ BCM MCMR-13 Handguard, 1/7.7 Twist Ionbond Finish on barrel.

Pair this 12.5'' 5.56mm BANSHEE upper group with the Mk4/standard AR15 lower group of your choice to create a compact AR pistol or SBR that blends maneuverability with carbine like ballistic performance. Available in different Cerakote finishes, all...

Machined from billet 7075-T6 aluminum, the AXTS AX556 is a fully ambidextrous lower receiver for AR15-style firearms. In addition to the Talon Ambidextrous Safety Selector, left-side magazine release, and right-side bolt release, the AX556 features the...

For more than 50 years the famed silhouette of the M16/M4 has only had one major and several minor changes. With the advent of the USASOC URGI, that quintessentially American silhouette has changed forever. The Geissele Super Modular Rail MK 16...

Kick off your next 9mm AR pistol build with the BANSHEE Mk9 pistol lower group. Made to accept Colt-style 9mm SMG magazines, the Mk9, CMMG's original 9mm platform, is designed to pair with any of the 9mm Radial Delayed Blowback uppers. BANSHEE Mk9 lower...

With over a century of service across the world, .45 ACP has been the pistol caliber of choice for many shooters. For anyone looking to complete the ultimate pistol caliber carbine, the RESOLUTE Upper Group chambered in .45 ACP is here. Available in...

Designed to accommodate Glock-pattern 10mm magazines, the RESOLUTE Mk10 lower group give shooters the ability to build a unique, feature packed 10mm pistol caliber carbine/rifle. Available in Cerakote finishes, each Mk10 rifle lower comes with a suite of...

The design philosophy behind the Radian Model 1 is simple: use the highest quality raw materials, most precise CNC machining equipment, and best components available to create a weapon that seamlessly blends form and function. Beyond quality and...

Created to combine the best attributes of 9mm and 45 ACP, .40 S&W has proven itself to be an incredibly capable round. Now anyone looking to build a powerful and ultra-compact .40 S&W personal defense weapon can in no time. Simply pair with a CMMG MkGs...

DS-15 Stripped Matched Billet Receiver Set (Standard)

Whether it's the classic style or forward assist functionality that piques your interest, the Mk4 AR15 upper receiver assembly has been a staple in the CMMG lineup. Available in different Cerakote finishes, this mil-spec workhorse has been proven over...