SBS Skeleton Style Collapsible Stock Much more than just a stock. Wider and rounded frame for ultimate comfortfor the cheek. Lever locker – prevents collapsing stock accident. Fits both commercial and mil spec’ buffer tubes. Rubber non-slip buttpad with tapered angle, allows faster shouldering and increased comfortwith body armor. Two ultrasonically welded metal quick release sling mount points. Soon, unique additional battery compartment and rear mono pod