The Diamondback Obsidian DB15 AR Pistol brings the DB15 series into a compact 11.5" barrel 5.56 NATO platform built for short-barrel performance and real-world use; the 1:8 RH diamondback 4150 CrMoV barrel with black nitride finish and carbine-length direct impingement gas system pairs with a shot-peened, MPI Mil-Spec 8620 carrier BCG and forged 7075 T-6 A3 flattop upper and lower to deliver reliable, hard-hitting function for range work, duty applications, and close-quarters defense. The 11" M-LOK anti-rotation V4 S-rail with full Picatinny and QD mounts keeps accessories low and lightweight while the DB Obsidian 1/2x28 muzzle brake tames recoil for faster follow-up shots; Magpul MOE K2 grip and Magpul MOE enhanced trigger guard improve ergonomics and weapon manipulation, and the SB Tactical SBA5 brace provides comfortable control in a compact overall length of 28.25" collapsed to 31" extended with a carry weight around 6.2 lb. As an AR-style semi auto pistol offering 30+1 capacity and no factory sights, the Obsidian is suited to tactical training, carbine-style competition stages, and mission-focused use; transfers require an FFL.