The Advanced Technology Int. is an AR-15/AR-10 Six-Position Adjustable Mil-Spec Stock. It fits AR-15/AR10 Firearms with Military Buffer Tube. (No Buffer Tube Is included with this Stock). The TracLock System provides smooth and secure stock adjustments and eliminates the horizontal and vertical movement of the stock on the buffer tube. Comes with an X Series thin butt-pad which is non-slip and removable. It has a duel sided QD attachment point and a slot for a tactical sling attachment. Made from DuPont(R) Extreme Reinforced Polymer and is weatherproof. Made in the USA.