The Diamondback DB15 is a popular, budget-friendly AR-15 style rifle and pistol platform known for offering solid features for its price point, with many models incorporating Magpul furniture and M-LOK handguards. Key Features and Specifications (Typical 5.56 NATO Rifle) The Diamondback DB15 comes in a variety of configurations (barrel lengths, calibers, finishes), but the standard rifle configuration shares several key components. Caliber: Primarily chambered in 5.56 NATO (also safely accepts .223 Remington), with some variants available in .300 Blackout, 6.5 Grendel, and .338 ARC. Operation: Uses a direct impingement gas system. Receivers: Features forged 7075-T6 aluminum upper and lower receivers, which are known for durability and lightweight performance. Barrel: Typically a 16-inch 4150 Chrome Moly Vanadium steel barrel with a 1:8 twist rate and A2 flash hider. Bolt Carrier Group: The shot-peened, MPI-inspected 8620 bolt carrier group ensures reliable cycling and integrity. Handguard: Most modern versions come with a free-float M-LOK handguard for accessory mounting. Furniture: Often includes a Magpul MOE grip and a Magpul collapsible carbine stock. Weight: The base weight for a 16-inch rifle is approximately 6.5 to 6.8 lbs.