Ar-15/M16 A5 Mil-Spec Buffer Tube - A5 Receiver Extension Tube

Specifically designed at the request of the U.S. Marine Corps, the EMOD A5 stock system enhances both operator comfort and the reliability of the rifle. With seven length-of-pull adjustment positions at .65" increments, the A5 system can offer a longer length of pull than an M16A2 fixed stock, yet collapses to the same length as an M4 carbine. A5 Receiver Extension and A5 Spring/Buffer kit are sold separately to enable upgrading an existing carbine to the longer, 7-position extension for use wit