The Ultralight (AR-UL) Stock is the lightest AR stock ever devised! The AR-UL has 2 Sling points and uses Ace�s original soft foam overtube for the ultimate cheek weld. A billet machined gusset reinforces the receiver extension tube at its weakest point directly behind the receiver. Precision machined aluminum butt clamps directly to the RET and provides a machined in sling mount. Buffer Tube Buffer Spring and Buffer NOT included.