AR15 Ultra Lite Stock. The lightest AR stock ever devised! Weighs only 142g ( approximately 5 oz )! An AR15 A2 stock weighs 390g ( 14 oz.) This stock also uses ACE's original soft foam over tube for the ultimate cheek weld. A billet machined gusset reinforces the receiver extension tube at it's weakest point- directly behind the receiver. Said gusset also sports an 1 1/4" ambidextrous QD sling swivel. The precision machined aluminum butt clamps directly to the end of the receiver extension tube and also provides a machined in sling mount. Curved rubber recoil pad included. Receiver extension tube, buffer & spring not included. Post ban compliant!