For Custom Barreling Projects; Includes Feed Ramp Cut For Reliable Chambering

Specifically designed for carbine installations, this is a correct-spec M4 barrel extension with feed ramp and pre-drilled hole for locator pin. Perfect for custom builds, rebarreling jobs, and caliber conversion projects. Integral feed ramp is required for proper chambering in carbine configurations and adds an extra measure of insurance for smooth, reliable feeding in rifles. Fully machined from high-grade 4140 chrome-moly steel for precise fit, strength, and durability.