The Diamondback DB15O in 5.56 NATO (brand part no. DB1984K001) is a semi-automatic pistol built around an 11.5-inch barrel finished in black nitride, cut with a 1-in-8-inch twist and threaded 1/2×28. Diamondback Firearms finishes this DB15O in black and equips it with Picatinny and QD sling mounts and a stabilizing brace, shipping the pistol with a 30-round PMag. Among AR-pattern pistols in the AR pistols category, the DB15O favors shooters who want a longer 11.5-inch barrel with a brace already installed.

Key Specifications

• Chambered in 5.56 NATO.
• Operates as a semi-automatic pistol.
• Features an 11.5-inch barrel.
• Barrel is finished in black nitride.
• Uses a 1-in-8-inch rate of twist.
• Muzzle is threaded 1/2×28.
• Ships with a 30-round PMag.
• Fitted with Picatinny and QD sling mounts.
• Equipped with a stabilizing brace.

Frequently Asked Questions

Does this pistol include a brace? Yes, a stabilizing brace ships installed.

What sling mounts does this pistol have? Picatinny and QD mounts.

Buy the Diamondback DB15O Pistol

A longer 11.5-inch barrel with a brace already installed is exactly what the DB15O delivers. Order it from our Lubbock, Texas gun shop for fast, insured shipping to your FFL.