The Diamondback Obsidian DB15 AR Pistol brings the Obsidian series into a compact, fast-handling package with an 11.5" 4150 CrMoV black nitride barrel, 1:8 twist, chambered in 5.56 NATO for common rifle ammunition and reliable ballistic performance, and it requires FFL transfer for purchase. Youll appreciate the carbine-length gas, direct impingement system and shot-peened, magnetic particle inspected Mil-Spec 8620 carrier BCG for consistent cycling, and the A3 flattop forged 7075 T6 upper and forged 7075 T6 lower with Magpul MOE enhanced trigger guard provide a rugged, lightweight platform for duty, home defense, or range training. The 11" M-LOK V4 S-Rail handguard with anti-rotation, full Picatinny and QD mounts keeps accessories low-profile and fast to install while the SB Tactical SBA5 FDE brace and Magpul MOE K2 grip give ergonomic control for rapid follow-up shots. The DB Obsidian muzzle brake (1/2x28) tames recoil on short-barrel 5.56 loads, and the overall 6.25 lb weight with 28.25"31" OAL makes it maneuverable in tight quarters. As a semi-auto AR-15 platform handgun in Flat Dark Earth Cerakote, this DB15 balances tactical capability, modularity, and familiar parts compatibility for shooters who want a compact, mission-ready AR pistol.