If you are looking for one of the most reliable and well-built AR-9 platforms on the market, then the buck stops here with the Angstadt Arms UDP-9. This model is built from start to finish with some of the industry's best manufacturing processes and quality control measures. Just take a look at all of these incredible features!

• Last round bolt hold open on an empty magazine
• Flared magwell for faster reloads
• Integrated, oversized trigger guard
• 7075-T6 billet aluminum lower with a matte black hard-coat anodized finish
• 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 1/10 twist, black melonite finish, and A2 style flash suppressor
• SB Tactical SBA3 pistol stabilizing brace with 5-position adjustable length of pull settings and an integral, ambidextrous QD sling socket
• Magpul K2 or B5 Systems pistol grip (depending on availability)
• Angstadt Arms 5.5” free float M-LOK handguard with a modern, ergonomic, 7 side design that allows for 45 degrees offset mounting options
• Continuous top mil-spec 1913 Picatinny rail
• Length: 22″
• Patent pending
• Accepts all Glock aftermarket magazines. We recommend using factory Glock® magazines
• Includes one 17 round magazine