Sports South Exclusive. The Diamondback DB15 Rifle features a carbine-length, medium 4150 chrome moly barrel, mid-length gas system and a shot-peened Mil-Spec 8620 bolt carrier. It utilizes 7075-T6 aluminum receivers, 15″ M-Lok handguard, Magpul grip and a Magpul Carbine stock. Includes 30rd Magpul Gen M2 PMAG and Viridian Venta 1×20 Green Dot, FDE.