Diamondback DB15 5.56/.300 AAC Blackout Combo

The Diamondback DB15 Combo pairs a 5.56 NATO configuration with a .300 AAC Blackout upper to provide a flexible, multi-caliber modern sporting rifle platform for range use, training, and general-purpose shooting. The package is built to allow quick caliber changes while retaining familiar AR-style ergonomics and controls.

The rifle features forged A3 flattop receivers machined from 7075-T6 aluminum and a 12-inch M-LOK free-float handguard for accessory mounting. Controls include a Magpul MOE carbine stock and MOE grip, and the barrels are finished with a black nitride treatment and terminate in an A2 flash hider with 1/2″-28 threading.

Key Specifications

• The caliber options included are 5.56 NATO and .300 AAC Blackout.
• The action is Semi-Auto.
• The barrel length for the primary assemblies is 16 inches.
• The capacity is listed as 30 + 1.
• The rate of twist is 1:8.
• The weight is 6.65 lbs.
• The overall length is 32.50″ to 35.75″ depending on stock position.
• The handguard is a 12″ M-LOK free-float rail for accessories.
• The receiver material is 7075-T6 Aluminum.
• The muzzle device is an A2 Flash Hider installed on a 1/2″-28 tpi thread pattern.

This DB15 combo delivers a versatile, modular AR-platform solution with components that support straightforward caliber changes and accessory mounting. For those seeking a dual-caliber rifle package, buy the Diamondback DB15 5.56/.300 AAC Blackout online today.