New! Aluminum Bufferless Stock Adapters with Picatinny Rails and QR Holes, BlackNew Aluminum Stock Adapters with Picatinny Rails and QR Hole, Black. SKU PSAP02 Replaces your buffer tube assembly with the ability to add a stock, directly to your AR 15 or AR 10 upper. For use with Uppers where everything is contained in the upper. Compatible with most folding Buttstock or Stabilizers. 3 Slot Picatinny Rail Easy Tightening System Hole for QR Sling Swivel (sling swivel not included) High Quality Aluminum Construction, Anodized Black.