The Angstadt Arms UDP-300 is a versatile platform chambered in .300 Blackout, available in rifle, SBR, and pistol configurations. It adds to the Angstadt Arms AR-15 arsenal for applications like CQB, home defense, tactical operations, or sports shooting. The UDP-300 is compatible with standard AR-15 components and aftermarket parts. It features top-tier parts and solutions from Angstadt Arms, such as a 6-16" barrel, a durable 7075-T6 aluminum construction, an AR-15-compatible magazine, an AR-15-style trigger, and an SBA-3 stabilizing pistol brace or a B5 Bravo stock. It is packed with a threaded muzzle with 5/8"-28 threads, which supports a muzzle brake or a suppressor, an aluminum handguard with M-LOK attaching slots, and a top Picatinny rail for standard riflescope mounts. The UDP-300 AR-15s are available in different Cerakote finishes. All the crucial parts are anodized for corrosion resistance and durability during heavy-duty use.