CMMG AR-15 Carbine Receiver Extension Kit 6-Position Mil-Spec Buffer Tube

Build or finish your AR-15 lower with the CMMG Carbine Receiver Extension Kit. This Mil-Spec, 6-position carbine receiver extension kit is designed for standard 5.56mm NATO AR rifle builds and includes the core components needed for a reliable buffer system. Constructed from high-quality anodized aluminum with a black finish, it’s a durable choice for new builds and lower completions.

Product Highlights

• Mil-Spec AR-15 carbine receiver extension kit ideal for completing a lower build
• 6-position carbine buffer tube supports common adjustable AR-15 stock setups
• Includes receiver extension, end plate, carbine buffer, and carbine action spring
• High-quality anodized aluminum construction for durability and corrosion resistance
• Designed to work with standard 5.56mm NATO AR rifle builds

Specs

• Brand: CMMG
• Manufacturer Part Number: 55CA6C7
• UPC: 815835017389
• Platform Compatibility: AR-15
• Receiver Extension Type: Carbine
• Adjustment Positions: 6-position
• Specification: Mil-Spec
• Material: Anodized aluminum
• Finish/Color: Black
• Included Components: Receiver extension (buffer tube), end plate, carbine buffer, carbine action spring
• Approx. Weight: 1.0 lb