The UDP-9 Pistol with SB Tactical SBA3 stabilizing brace is a compact AR-15 style firearm chambered in 9mm and fed with GLOCK magazines. It features last round bolt hold open and is compatible with factory and aftermarket Glock 9mm magazines. Features: Recommend using factory Glock magazines. Will accept all Glock aftermarket magazines. SB Tactical SBA3 pistol stabilizing brace with 5-position adjustable length of pull settings and an integral, ambidextrous QD sling socket Angstadt Arms 5.5" free float M-LOK handguard with a modern, ergonomic, 7 side design that allows for 45 degree offset mounting options Magpul K2 pistol grip Last round bolt hold open on an empty magazine Flared magwell for faster reloads Integrated, oversized trigger guard Threaded bolt catch screw 9mm bolt assembly for use with a standard AR-15 hammer Continuous top mil-spec 1913 Picatinny rail Palmetto State Armory is your one-stop shop for Modern Sporting Rifles, Parts and Accessories!