Diamondback DB1784K791 DB15 Obsidian 5.56 NATO 30+1 16" Black Nitride Threaded Barrel, Jungle Green Cerakote Picatinny Rail Aluminum Receiver, Magpul CTR Black Synthetic Stock & Magpul MOE K2 Grip

The Diamondback DB15 Obsidian in 5.56 NATO is a mid-length direct impingement rifle built for shooters who want reliable, field-ready performance without compromise. This 16-inch carbine strikes a practical balance between handling speed and velocity, making it equally at home on the range, in tactical training, or as a dependable home-defense platform. The Jungle Green Cerakote finish over a forged 7075 T-6 aluminum receiver gives you durable, good-looking hardware that won't fade or chip easily, while the threaded barrel accepts standard 1/2 x 28 muzzle devices—the Obsidian brake comes installed.

Diamondback engines are known for solid, no-nonsense performance, and this one uses a mil-spec 8620 carrier that's been shot-peened and magnetically particle inspected for consistency. The 1:8 right-hand twist 4150 CrMoV barrel is nitride-treated for corrosion resistance and durability, and pairs with a mid-length gas tube to keep recoil manageable and cycling smooth across a range of ammo. You get Magpul furniture throughout—the MOE K2 grip is comfortable and secure, the CTR stock gives you length-of-pull adjustment, and the 15-inch M-LOK handguard with integrated Picatinny rail and QD mounts lets you mount lights, lasers, or other gear exactly where you need it. A mil-spec trigger and the included 30-round Magpul PMAG round out the package.

At 6.6 pounds and collapsible to 33 inches, this rifle is light enough to carry all day but rigid enough to hold zero under hard use. If you're looking for a versatile 5.56 carbine that doesn't ask you to compromise on quality internals or ergonomics, the Diamondback Obsidian deserves a serious look.

Key Features

• 16-inch 4150 CrMoV barrel with 1:8 twist, black nitride finish, and threaded muzzle (1/2 x 28)
• Mid-length direct impingement gas system for smooth, reliable cycling
• Forged 7075 T-6 aluminum upper and lower receivers with Jungle Green Cerakote finish
• 15-inch M-LOK handguard with integrated Picatinny rail and QD mount slots
• Magpul CTR stock and MOE K2 grip for ergonomic control and adjustability
• Mil-spec carrier inspected for quality; mil-spec trigger
• Includes Magpul Gen M3 PMAG 30-round magazine and Obsidian muzzle brake
• Lightweight at 6.6 pounds; collapses to 33 inches for compact handling

Specifications

Frequently Asked Questions

What muzzle devices are compatible with this rifle?

The barrel is threaded 1/2 x 28, which is the standard 5.56 NATO pitch. The Obsidian muzzle brake comes installed, but you can swap it for any 1/2 x 28 flash hider, suppressor, or brake that suits your needs.

Can I mount an optic on this rifle?

Yes. The upper receiver is a flat-top A3 with Picatinny rail, and there are no iron sights installed, leaving the rail clear for a scope, red dot, or other optic. The integrated Picatinny rail on the handguard also gives you space for lights or backup sights.

What's included in the box?

You get the rifle, a Magpul Gen M3 PMAG 30-round magazine, and the Obsidian muzzle brake (already attached). Sights are not included.

Is this rifle suitable for home defense or tactical training?

Yes. The 16-inch carbine length, mid-length gas system, and Magpul controls make it handy for close-quarters work, and the 5.56 NATO platform is popular for both home defense and professional training. The rail system lets you add lights or other defensive accessories as needed.