Features: Threaded 1/2 x 28 barrel standard Thumb magazine release Quick disconnect sling capability Compatibility for various buffer tubes and folding braces FREE trigger lock sling and swivels 10-round magazine (not interchangeable with C9) Last round lock open Picatinny rails at 12 & 6 o'clock Fully adjustable sights (rear peep & post front) Manual safety Barrel length: 13.25" Standard Back Plate: Accepts standard buffer tube Rear Rail: Picatinny rail insert Weight: 6.1 LBS. Overall length: 20.75" Rear Sights: Ghost Ring Aperture Finish: Black powder coat Front Sights: HiViz light pipes fiber optics