The Diamondback Obsidian DB15 AR Pistol in OD Green brings the DB15 series' compact firepower into a lightweight, maneuverable package with a host of range and duty-ready features that make it a go-to 5.56 NATO AR pistol for close-quarters training, truck gun carry, and static-range work; the 11.5" 4150 CrMoV barrel with 1:8 twist and Black Nitride finish pairs to a carbine-length direct impingement gas system for reliable cycling while the DB Obsidian muzzle brake (1/2 x 28) helps control recoil and sight recovery, and the shot-peened, magnetic particle inspected Mil-Spec 8620 carrier BCG ensures longevity under heavy use. The forged 7075 T6 A3 flattop upper and matching lower with Magpul MOE enhanced trigger guard offer a durable platform for optics and controls, while the 11" M-LOK Anti-Rotation V4 S-Rail handguard with full Picatinny and QD mounts provides real estate for lights and offset sights; ergonomics come from the Magpul MOE K2 grip and SB Tactical SBA5 brace in FDE for stable single-handed shooting and legal AR-pistol configurations where allowed. Finished in FDE Cerakote over an OD Green aesthetic, weighing about 6.25 lb and measuring 28.25" to 31" overall, this AR-15 platform pistol requires an FFL transfer and is well suited for duty-style drills, personal defense setups, and tactical-style competition.