Diamondback Db15 Dia Db1916B001 300 10 Sba3 30R Blk

The Diamondback DB15 in 300 AAC Blackout with SBA3 brace is a compact, pistol-configured AR platform built for shooters who want serious capability in a maneuverable package. This 300 Blackout upper pairs a 10-inch heavy barrel with a pistol-length gas system, delivering the subsonic and supersonic versatility that makes this cartridge a favorite for both suppressed and unsuppressed shooting. The SB Tactical SBA3 brace gives you a stable cheek rest and improves control when firing one-handed or braced against your body—exactly what you need in a specialized platform like this.

Build quality shows throughout. The upper is a forged 7075 T-6 aluminum A3 flattop with a T-marked profile, while the lower uses the same aircraft-grade 7075 T-6 material in Diamondback's carbon-infused design. The barrel is 4150 CrMov with black nitride coating, chambered 1:8 right-hand twist to stabilize a wide range of 300 Blackout loads. A mil-spec carrier—shot-peened and magnetic particle inspected—ensures reliability, and the standard mil-spec trigger breaks clean and predictable. The whole system weighs just 5.7 pounds when fully assembled, making it fast to move and comfortable to shoot for extended sessions.

The 9-inch M-LOK rail gives you plenty of room to mount lights, lasers, or other accessories without unnecessary bulk, while the Magpul MOE grip and included 30-round Magpul Gen M2 PMAG provide solid ergonomics and reliable feeding. An A2-style flash hider (5/8×28 thread) comes ready to accept aftermarket suppressors if you want to go that route. This is a purpose-built 300 Blackout pistol AR that doesn't compromise on materials or design—ideal for tactical practice, close-quarters work, or hunters who value a compact, controllable platform.