The SPRIII carries forward the heritage of the legendary MK12 while refining it with modern upgrades for today's precision shooter. Designed for long-range accuracy, this rifle combines legacy features with cutting-edge enhancements. Specifications and Features: Mounting System: M-LOK Caliber: 5.56mm NATO Muzzle Thread: 1 ? 2 x 28 TPI (Threads Per Inch) Gas System: Rifle Barrel Length: 18" Barrel Profile: MK12 Muzzle Device: DD Flash Suppressor Rail System: RIS III w/ full length ARCALOCK bottom panel Product Weight: 8.6 lbs Length: 34 3/4" - 37 7/8" (w/ muzzle device) Magazine: DD Magazine (32 Round) Case: Daniel Defense Full-Latch Impact Plastic Case Manufacturer: Daniel Defense