CMMG R.D.B. Lower Receiver Assembly, MkGs, MkG, Mk10, Mk17, Mk57 (Lower receiver, mag catch, BHO Linkage)

Lower Receiver Assembly, MkGs(Lower receiver, mag catch, BHO Linkage)

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, and multiple finish options. The MkGs lower receiver can utilize any AR-15 mil-spec Lower Parts Kit or Drop-in Trigger of choice, making the MkGs an incredibly customizable multi-caliber lower receiver.

Each receiver is finished in your choice of one of seven premium Cerakote options.

All CMMG products come with our Lifetime Quality Guarantee.

**MkGs Lowers are designed to work with CMMG MkGs .40 S&W or 9mm Radial Delay Blowback Uppers only**

Lower Receiver Assembly, MkG(Lower receiver, mag catch, BHO Linkage)

The original entry in the Radial Delayed Blowback series, the CMMG MkG Lower Assembly is perfect for anyone wanting to build a pistol caliber carbine (PCC) that packs the punch of .45 acp without the recoil or weight of traditional blowback operated PCCs. Designed to accept Glock and SGM .45 acp magazines, the MkG lower features an integrated trigger guard, oversized magazine release, flared magwell, and last round bolt hold-open functionality. Available in multiple Cerakote colors, all you need to finish the MkG build is a Stock or Pistol Brace Kit and an AR15 Lower Parts Kit. Swap in a Drop-In Trigger for a more fine-tuned and customized trip to the range.

All CMMG products come with our Lifetime Quality Guarantee.

**MkG Lowers are designed to work with CMMG MkG Uppers only. Other manufacturer's uppers may work, but we cannot guarantee function or reliability**

Lower Receiver Assembly, Mk10

Designed to accept and function properly with 10mm Glock and SGM magazines, the Mk10 lower receiver assembly is built to the same fit and finish expected of any CMMG product. Featuring an integrated trigger guard, last round bolt hold open, as well as an oversized magazine release and flared magwell makes for quick and easy mag changes. The Mk10 lower comes ready to accept any AR-15 mil-spec Lower Parts Kit or Drop-In Trigger of your choice.

Multiple Cerakote finish options standard.

All CMMG products come with our Lifetime Quality Guarantee.

**Mk10 Lowers are designed to work with CMMG Mk10 Uppers only**

Lower Receiver Assembly, Mk17, 9mm, P320

Accepting Sig Sauer M17/P320 magazines, the CMMG Mk17 delivers a new level of performance to the PCC world. Not only is it on an elite playing field in terms of fit and function, the Mk17 brings out all the features you’ve come to expect from CMMG, including Last Round Bolt Hold Open. Designed to operate exclusively with our Radial Delayed Blowback upper, or build using our Barrel and Bolt combo.

All CMMG products come with our Lifetime Quality Guarantee.

Lower Receiver Assembly, Mk57

For those times you want to build your AR lower group exactly to your spec, the Mk57 Lower Receiver Assembly is here to fit the bill. Designed to accept AR15 accessories like trigger groups, safeties, and grips; this lower receiver pairs with our 5.7x28mm Radial Delayed Blowback upper groups and allows for maximum compatibility between your Mk57 build and other firearms that utilize FN®* Five-seveN®* pattern magazines.

**Mk57 Lowers are designed for use with CMMG 5.7x28mm Radial Delayed Blowback uppers only**

All CMMG products come with our Lifetime Quality Guarantee.

Lifetime Quality Guarantee

We aim to please, that’s why every CMMG product is backed by our Lifetime Quality Guarantee against material and workmanship defects. Learn More.