Diamondback DB1984K061 DB15 Obsidian 5.56 NATO 30+1 11.50" Black Nitride 11" M-LOK Handguard SBA5 Brace Magpul MOE K2 Grip

The Diamondback DB15 Obsidian is a 5.56 NATO pistol built for shooters who want a compact, modular platform without compromise. This 11.5-inch barreled AR pistol delivers the accuracy and ergonomics of a full rifle in a footprint that works in tight quarters—whether you're running drills at the range, building a truck gun, or setting up a versatile home-defense rig. The Obsidian name comes from the DB Obsidian muzzle brake, a signature Diamondback component that helps manage recoil in a package this short.

The build quality here is serious: a forged 7075 T-6 aluminum upper and lower, a 4150 CrMoV barrel with black nitride finish, and a direct impingement carbine-length gas system that's proven reliable across thousands of rounds. The 11-inch M-LOK handguard gives you full Picatinny rails plus QD mounts, so mounting lights, lasers, or slings is straightforward. The SB Tactical SBA5 brace and Magpul MOE K2 grip come in FDE to match the overall finish, and the whole thing weighs just 6.25 pounds—manageable enough to shoot all day without fatigue.

You get a 30-round Magpul Gen M3 PMAG in Coyote Tan and a standard mil-spec trigger. The A3 flattop upper comes T-marked, and the BCG is shot-peened with magnetic particle inspection for durability. No sights are included, so you'll want to pick your own optic or iron sights to match your mission. At 28.25 inches collapsed and 31 inches extended, it's a genuinely compact firearm that doesn't feel cramped or underbuild.

If you're shopping for a short-barreled 5.56 pistol that doesn't cut corners on materials or features, the Diamondback DB15 Obsidian earns its place on your bench or your truck.

Key Features

• 5.56 NATO chambering with 11.5-inch barrel for compact handling
• Forged 7075 T-6 aluminum upper and lower receivers
• 4150 CrMoV barrel with black nitride finish and 1:8 twist rate
• Carbine-length direct impingement gas system
• 11-inch M-LOK handguard with full Picatinny and QD mounts
• DB Obsidian muzzle brake (1/2 x 28 thread) for recoil management
• SB Tactical SBA5 pistol brace for added control and support
• Magpul MOE K2 grip and MOE enhanced trigger guard
• Magpul Gen M3 PMAG 30-round magazine included
• Mil-spec trigger, shot-peened MPI BCG
• Lightweight at 6.25 pounds

Specifications

Frequently Asked Questions

What sights come on this pistol?

No sights are included. You'll need to install your own optic or iron sights depending on your intended use.

Is the SBA5 brace legal for civilian use?

We sell this firearm as configured. Always verify current federal and local laws regarding pistol braces and short-barreled rifles in your jurisdiction before purchase.

What magazine is included?

A Magpul Gen M3 PMAG 30-round magazine in Coyote Tan is included.

Can I mount a light or laser on the handguard?

Yes. The 11-inch M-LOK handguard features full Picatinny rails and QD (quick detach) mounts for seamless accessory mounting.