The Diamondback DB15 .300 Blackout is a compact 10-inch AR pistol built around a Smoked Bronze Cerakote finish and an SB Tactical SBA3 stabilizing brace (Diamondback part no. DB191AB211). Diamondback builds the DB15 Carbon lower and A3 flattop upper from forged 7075-T6 aluminum in Cocoa, Florida, and tops it with a 9-inch M-LOK handguard. The pistol-length direct impingement gas system and a heavy 1:8 twist barrel suit the subsonic and supersonic loads that make .300 Blackout popular. It ships with a Magpul 30-round PMAG and an A2 flash hider, so it is range-ready for a red dot or iron sights of your choosing. For a short, handy truck gun or a suppressor-host build, this Diamondback pistol covers the ground without adding a stock.

Key Specifications

• The chambering is .300 Blackout, a cartridge designed to deliver AR-15 handling with heavier bullets and strong subsonic performance.
• The barrel is 10 inches long, a short length that keeps the overall pistol compact and easy to maneuver in tight spaces.
• The barrel is heavy-profile 4150 CrMoV steel with a black nitride finish and a 1:8 right-hand twist, a rate that stabilizes the heavier .300 Blackout bullets.
• The gas system is pistol-length direct impingement, the proven AR operating system tuned to a short barrel.
• The handguard is a 9-inch M-LOK rail, giving you attachment slots for a light, grip or sling hardware.
• The stabilizing brace is an SB Tactical SBA3, which gives the shooter a secure brace point on the forearm for steadier shooting.
• The magazine is a Magpul Gen M3 PMAG holding 30 rounds, a durable polymer design that is easy to find and affordable to stock.
• The muzzle device is an A2 flash hider threaded 5/8×24, a standard pattern that also accepts many aftermarket muzzle devices.
• The finish is Smoked Bronze Cerakote, a wear- and corrosion-resistant coating with a distinctive color.
• Length is 26 inches collapsed and 28.5 inches extended, and weight is 5.7 pounds, so the pistol stays light enough to carry all day.

Frequently Asked Questions

Does this pistol come with a stock? No. It is configured as a pistol with an SB Tactical SBA3 brace and no shoulder stock, and the maker lists no sights, so you add your own optic or iron sights.

What muzzle device does it have? An A2 flash hider with 5/8×24 threading, which is the common pattern for muzzle devices and many suppressor mounts.

What is included with the pistol? The maker lists a Magpul Gen M3 PMAG with a 30-round capacity, and the pistol is built on the DB15 Carbon lower with a Magpul MOE grip and standard mil-spec trigger.

Buy the Diamondback DB15 Carbon 10-Inch AR Pistol .300 Blackout with SBA3 Brace, Smoked Bronze

Diamondback pairs a no-nonsense forged aluminum platform with a finish that stands out at the range. Browse more AR pistols or order this one from our Lubbock, Texas gun shop for fast, insured shipping to your FFL.