Diamondback DB15 Combo Features Built around a lightweight yet durable Diamondback carbon lower and a 7075-T6 aluminum upper the DB15 Combo is finished in a striking Flat Dark Earth (FDE) Cerakote providing both rugged protection and visual appeal. The 16-inch chromoly steel barrel is treated with a black nitride finish for enhanced longevity and resistance to wear while the 1:8 twist rate allows for consistent performance across a range of bullet weights in both calibers. Outfitted with a 12-inch M-LOK handguard this rifle is ready for mounting a wide range of AR-15 accessories such as lights lasers and foregrips. The optics-ready upper with a Picatinny rail ensures flexibility for sighting options. Handling is enhanced with a Magpul MOE adjustable carbine stock and Magpul grip offering a customizable fit and ergonomic control. The A2 flash hider and manual thumb safety round out a feature-rich platform designed for performance and safety. With its direct impingement system the DB15 Combo ensures smooth and reliable cycling for every round. Diamondback DB15 Combo Specifications Manufacturer: Diamondback Model: DB15 Combo Series: Combo Caliber: 5.56x45mm NATO / .300 AAC Blackout Type: Semi-Auto Rifle Action: Direct Impingement Capacity: 30 + 1 Barrel Length: 16 Barrel Material: Chromoly Steel Barrel Finish: Black Nitride Twist Rate: 1:8 Thread Pattern: 1/2-28 TPI Muzzle Device: A2 Flash Hider Receiver Material: 7075-T6 Aluminum Upper / Diamondback Carbon Lower Receiver Finish: Flat Dark Earth Cerakote Handguard: 12 Free-Float M-LOK Grip: Black Magpul Stock: Adjustable Magpul Carbine Stock Material: Synthetic Stock Finish: Black Sights: Optic Ready Safety: Manual Thumb Magazine Type: AR-15 Standard Magazine Included: 1 (30-Round) Overall Length: 32.50 - 35.75 Weight: 6.65 lbs Gun Platform: AR-Style Hand: Right