Diamondback DB15 AR 15 Features This 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 MOE-K2 grip and a Magpul CTR stock. This model has a Diamondback Black Gold lower receiver. Diamondback DB15 AR 15 Specifications Caliber: 5.56 NATO Model: DB15 Stock Finish: Black Action: Semi-Auto Sights: None Optic Ready Capacity: 30 Muzzle: Flash Hider Grips: Magpul K2 Hand: Right Receiver Description: Diamondback Black Gold Receiver Finish: Flat Dark Earth Receiver Material: 7075 T6 Aluminum Stock Description: Adjustable Magpul CTR Stock Material: Synthetic Thread Pattern: 1 / 2-28 tpi Twist: 1:8 Weight: 6.80 lbs Barrel Description: 4150 Chrome Moly Barrel Finish: Black Nitride Barrel Length: 16