The UDP-9 is the perfect AR pistol for plinking at the range. Chambered in 9mm this firearm is useful for people of all sizes. It is compatible with Glock style magazines and comes equipped with a SB Tactical SBA3 pistol brace. Details Magpul Flat Dark Earth (FDE) Cerakote H-267Q finish on lower receiver upper receiver and handguard - Last round bolt hold open on an empty magazine - Flared magwell for faster reloads - Integrated oversized trigger guard - 7075-T6 billet aluminum lower receiver - 7075-T6 billet aluminum slick side upper receiver with appropriately sized ejection port and no forward assist or dust cover - Threaded bolt catch screw - 9mm bolt assembly for use with a standard AR-15 hammer - 6 9mm barrel in chrome moly with a 110 twist black melonite finish and A2 style flash suppressor - Barrel is threaded 1236 and can accept a suppressor - SB Tactical SBA3 pistol stabilizing brace with 5-position adjustable length of pull settings and an integral ambidextrous QD sling socket - Magpul K2 pistol grip - Angstadt Arms 5.5 free float M-LOK hand guard with a modern ergonomic 7 side design that allows for 45 degree offset mounting options - Continuous top mil-spec 1913 picatinny rail - Weight Sub 5lbs - Length 22in - Patent pending - Accepts all Glock aftermarket magazines. We recommend using factory Glock magazines - Includes one OEM Glock 15 or 17 round magazine