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.

Angstadt Arms UDP-9 Semi-Automatic 9mm Luger 6" 15+1 Black hard coat Anodized Finish Angstadt Arms' UDP-9 Pistol utilizes a 7075-T6 billet aluminum receiver with appropriately sized ejection port and no forward assist or dust cover. The Angstadt Arms 5.5" free-float M-LOK hand guard features a seven (7) side design that allows for 45 degree offset mounting options and a mil-spec 1913 Picatinny rail. Its barrel is chrome moly with black melonite finish, A2 style flash suppressor, and 1/236 threads. The UDP-9 Pistol also has a SB Tactical SBA3 pistol stabilizing brace with 5-position adjustable length of pull and an integral, ambidextrous QD sling socket, Magpul K2 pistol grip, and flared magwell. Included is one 15-round Glock magazine. This model has a 6" barrel and a black hard coat anodized finish.