Features a friction locking mechanism that eliminates movement between the buffer tube and buttstock for a solid ?feel? when mounting rifle to shoulder. Heavy duty, spring-loaded hand lever allows fast length-of-pull adjustments. Nylon polymer body provides maximum impact and heat resistance, with molded-in reinforcements at stress points for added strength. Accepts a variety of ambidextrous sling attachment options, including web slings and single-point, push-button sling mounts. Comb contour is wider than standard issue M4 stock to help shooter maintain a solid cheekweld. Fits buffer tubes that accept both four- and six-position collapsible stocks. Buffer tube, carbine buffer, receiver extension nut, and carbine-length action spring not included