Diamondback DB15 CO Compliant Features The Diamondback DB15 CO Compliant is built around a 16 carbine-length medium contour barrel made from 4150 CrMoV steel with a black nitride finish giving the rifle a durable corrosion-resistant bore that stands up to repeated use in the field or at the range. A 1:8 right-hand twist rate stabilizes a wide range of 5.56 bullet weights and the shot-peened magnetic particle inspected mil-spec 8620 bolt carrier group ensures reliable cycling shot after shot even under sustained use. A carbine-length gas system feeds the action consistently and an A2 flash hider threaded 1/2x28 helps manage muzzle flash during low-light shooting keeping the shooter s sight picture clear. The forged 7075 T-6 aluminum lower and A3 flattop forged 7075 T6 aluminum upper combine for a rigid durable receiver set built to last giving the platform a stable base for mounting optics and accessories. A 15 M-LOK rail gives shooters a slim ergonomic handguard with plenty of room to mount lights optics or other accessories as needed making the rifle easy to configure for a variety of roles. The MOE grip and MOE carbine stock provide a comfortable familiar feel for shooters accustomed to the AR-15 platform and the adjustable stock allows the length of pull to be tailored to the individual shooter. Configured to meet Colorado s magazine capacity restrictions the rifle ships with a 10-round Gen M3 PMAG for immediate compliant use right out of the box. Finished entirely in black anodized hardcoat for a consistent corrosion-resistant look this rifle offers Colorado shooters a dependable ready-to-run AR-15 for home defense training or general sport shooting. Diamondback DB15 CO Compliant Specifications Manufacturer: Diamondback Model: DB15 CO Compliant Caliber: 5.56 NATO Action: Semi-Auto Capacity: 10+1 Barrel Length: 16 Barrel Finish: Black Nitride Twist Rate: 1:8 RH Thread Pattern: 1/2x28 Handguard: 15 M-LOK Receiver Finish: Black Anodized Stock: MOE Carbine Weight: 6.6 lbs Available At: GrabAGun