CMMG BBL AND BCG KIT 8 5.7X28MM

The CMMG BBL and BCG Kit 8 5.7x28mm offers a specialized solution for those looking to build or upgrade AR-style rifles or pistols chambered in 5.7x28mm. Featuring an 8-inch barrel, this kit is engineered around CMMG's innovative Radial Delayed Blowback system, which optimizes the bolt carrier group's weight and reduces felt recoil compared to traditional direct blowback mechanisms. This design enhances cycling reliability while maintaining key operational features such as last round bolt hold open.

Designed to fit Mk4 or mil-spec AR15 uppers, the kit is compatible with CMMG Mk57 lowers as well as standard AR15 lowers when paired with the appropriate 5.7x28mm conversion magazines. The barrel and bolt carrier group come finished in a durable black coating, ensuring durability and corrosion resistance. This kit is an excellent choice for builders seeking a precision-engineered barrel and BCG combination from a trusted manufacturer known for its quality and innovation in firearms components.