CMMG Receiver Extension and Stock Kit Carbine Mk3

The CMMG Receiver Extension and Stock Kit Carbine Mk3 is an essential component for shooters looking to complete the lower receiver group of their large-frame AR platform. This kit is specifically designed for those building or upgrading a .308 Winchester or 7.62x51mm NATO rifle, ensuring a reliable and adjustable interface between the shooter and the firearm.

Featuring a carbine-length, 6-position receiver extension, this kit allows for precise length-of-pull adjustments to accommodate various body types and the use of body armor. It includes a .308 carbine buffer assembly and a specialized .308 carbine action spring, both engineered to handle the increased mass and pressures associated with larger calibers. The robust construction of the buttstock assembly ensures stability and durability in field conditions while maintaining a lightweight profile.

Ideal for those seeking mil-spec quality and performance, this kit is particularly beneficial for users of the CMMG Mk3 platform. Installation is straightforward when paired with a standard lower parts kit, making it a popular choice for armorers and DIY enthusiasts who prioritize consistent cycling and durability in their builds.