CMMG MkG, MkGs, & Mk57 Platform Specifications

Bolt Carrier Group Materials:

Bolt – Steel, 9310

Carrier – Steel, 8620

Extractor – Steel, S-7

Ejector – Steel, S-7

Currently available in the following calibers:

45ACP(MkG)

9x19mm (MkGs)

5.7x28mm (Mk57)

Virtual Patent Information can be found here.