Guntec multi cal collapsible stock set w/adj cheek riser FEATURES:-High Density Polymer-Multiple Cutouts to Reduce Weight-5.56 Caliber-Neoprene Rubber Buttpad-Adjustable cheek riser w/ 6 different heights-Cheek riser has multi point locking system-Accepts QD Sling swivel on left or right side-QD Swivel -Complete w/ buffer tube, end plate, Castle nut, CAR buffer & Chrome recoil spring Other Features: New minimalist design complete w/buffer tube ambi 1 point sling plate castle nut, buffer & spring neoprene rubber buttpad