Diamondback DB15 30+1 10" 300 AAC Blackout / 7" 5.56 NATO FDE SBA3 Brace Semi-Auto Pistol

PLEASE READ THE FIREARM ORDER AGREEMENT BEFORE PURCHASING THIS ITEM

Most people end up wanting an AR pistol in both 5.56 and 300 Blackout eventually, and this Sports South exclusive DB15 package saves you from buying two guns. Diamondback pairs one lower with a 7" 5.56 NATO upper and a 10" 300 AAC Blackout upper, and a single bolt carrier group and charging handle run both. Pop two takedown pins, swap uppers, and you have gone from blasting inexpensive 5.56 at the range to running heavy subsonic 300 Blackout, which is exactly where that 10" barrel shines since the cartridge was built to burn its powder in short tubes.

Both barrels are heavy-profile Chrome Moly Vanadium with a black nitride finish and a 1:8 right-hand twist, which stabilizes everything from light varmint loads to the long, heavy subsonic bullets 300 Blackout fans love. Each comes threaded with an A2 flash hider installed, the 5.56 in 1/2×28 and the Blackout in 5/8×24, so adding a muzzle device or suppressor down the road is straightforward. Up top you get a free-floating M-LOK handguard with a full-length Picatinny rail for your optic, light, and whatever else you want to hang on it. No iron sights are included, so plan on a red dot or similar from day one.

The Flat Dark Earth Cerakote and Magpul furniture give this pistol a clean, cohesive look instead of the mismatched two-tone you see on some budget builds. The SB Tactical SBA3 brace adjusts for length and adds real stability, while the Magpul MOE K2 grip puts your hand at a more vertical angle that feels natural on a compact gun like this. Controls are standard AR pattern, and the mil-spec trigger works fine as-is or swaps easily if you get picky later.

Diamondback includes a 30-round Magpul Gen3 PMAG that feeds both calibers, so the whole kit is range-ready the day you pick it up. For home defense, truck gun duty, or just having one platform that does double duty, this combo covers a lot of ground for the money.

Features:

• A2 flash hider muzzle device helps control flash signature for improved low-light shooting performance
• M-LOK handguards are lightweight and modular, allowing for maximum adaptability in tactical setups
• Magpul Gen M3 PMAG enhances reliability with an improved feed lip design, a durable polymer body and a high-visibility follower
• SB Tactical Brace enhances stability and control, improving handling for compact firearm platforms
• Heavy threaded barrel allows for the attachment of suppressors or muzzle devices while maintaining excellent balance and precision
• Mil-Spec trigger delivers a reliable, consistent break for enhanced precision and performance

Specs:

Caliber: 5.56/300BLK
Barrel Length: 7"/10"
Capacity: 30+1 Roundrd
Trigger: Mil-Spec
Twist: 1:8"