What's in the Box Diamondback DB15 5.56 Nato Rifle (1) 30 Round Magazine Owner's Manual The Diamondback DB15 features a threaded barrel with an A2 flash hider muzzle device; A3 flattop forged 7075 T-6 aluminum T-Marked upper and a DB15 carbon lower; Magpul MOE grip; 15" M-LOK rail with texture pads; Picatinny rail; front and rear QD and hand stop. Includes 30rd Magpul Gen2 M2 PMAG. Firearm Features Black Synthertc Adjustable Stock Chrome Moly Vanadium Black Nitride 1/2"x28 Threaded Barrel A2 Flash Hider Muzzle Magpul Gen M2 PMAG 30 Round Magazine 15" M-LOK Handguard with Picatinny Rail Mil Spec Trigger Firearm Specifications Manufacturer: Diamondback Model: DB15 Caliber: 5.56 Nato Barrel Length: 16" Overall Length: 32.75"-36" Twist Rate: 1:8" RH Finish: Midnight Bronze Cerakote Sights: None; Accessory Rail Grips: Black Magpul MOE Pistol Grip Stock: Black Adjustable Magazine Capacity: 30+1