NcStar Classic Commercial Stock is a black polymer collapsible buttstock for AR-platform firearms with commercial spec buffer tubes (tube not included). Features a sleek design with QD holes on each side for QD cup bases, an integrated rubber butt pad for non-slip, secure shouldering and recoil mitigation, and a unique latch mechanism first click adjusts stock position, second click enables mounting/demounting from the buffer tube. Safety note Follow all manufacturer installation instructions. Verify proper function and secure mounting before use. Comply with local firearm laws and regulations.