The Diamondback DB15 convertible pistol pairs a 10-inch 5.56 NATO upper and an 8-inch .300 Blackout upper on one lower, so a single AR pistol covers two calibers (Diamondback Firearms part no. DB196AK191). It is finished in OD Green Cerakote with an FDE-coated barrel, an FDE Magpul MOE grip and an FDE SB Tactical SBA3 brace. Diamondback builds the DB15 at its Cocoa, Florida facility on a forged 7075-T6 aluminum receiver set. The compact length and light weight suit close-quarters handling, truck-gun duty and range days with two cartridges.

Key Specifications

• The chamberings are 5.56 NATO on the 10-inch upper and .300 Blackout on the 8-inch upper, so one lower runs two calibers.
• The barrels are 10 inches and 8 inches, 4150 CrMoV with a black nitride finish and an FDE Cerakote coating, both with a 1:8 twist.
• The handguards are M-LOK rails, 9 inches on the 5.56 upper and 7 inches on the .300 Blackout upper, for mounting lights and accessories.
• The finish is OD Green Cerakote with an FDE barrel, and the Magpul MOE grip and SB Tactical SBA3 brace are FDE.
• Each upper ships with a 30-round Magpul PMAG sized for its cartridge.

Frequently Asked Questions

Does one DB15 shoot both 5.56 NATO and .300 Blackout? Yes. It includes a 10-inch 5.56 NATO upper and an 8-inch .300 Blackout upper that mount on the same lower, each with its own handguard and 30-round magazine.

Is this an AR pistol or a rifle? It is a pistol, built with an SB Tactical SBA3 brace on a pistol-length gas system with direct impingement.

What muzzle devices are fitted? The 5.56 barrel has an A2 flash hider on 1/2×28 threads, and the .300 Blackout barrel has an A2 .30 caliber flash hider on 5/8×24 threads.

Buy the Diamondback DB15 Convertible Pistol, 5.56 NATO and .300 Blackout

Two calibers, two barrels and one lower make this DB15 an unusually flexible AR pistol. See more semi-auto handguns while you are here. Order it from our Lubbock, Texas gun shop for fast, insured shipping to your FFL.