Enhanced Bolt Carrier Group was designed for shooters who demand superior performance weapon components in the heart of their firearm. CMC proudly manufactures the highest quality firearms components in the industry and utilizes high-quality gas rings and springs in our bolt assemblies.

The STT enhanced carrier features a sand cut to allow debris to pass through. The bolt carrier group exceeds MIL-spec requirements. The external surfaces are CNC ground after heat treatment for a precision fit. The three gas ports on the side aids in slowing down the cycle speed of the bolt optimizing it for suppressor use.

New enhanced DLC-coated BCG is a fully upgraded version of STT’s other BCGs. Diamond-Like Carbon coatings are the hardest, most durable available.

• Dual ejector bolt head
• 5 coil extra power extractor spring
• Extra power bolt ejector springs
• Crane Spec O-ring
• Optimized for hard-use applications