Features: LOWER RECEIVER: Enhanced Flared Magazine Well and Rear Receiver QD Swivel Attachment Point. CNC Machined of 7075-T6 Aluminum Type III Hard Coat Anodized UPPER RECEIVER: CNC Machined of 7075-T6 Aluminum Type III Hard Coat Anodized BARREL: DD Proprietary Steel Cold Hammer Forged 1:8" (6.5 Creedmoor) 1:10" (7.62) 18a ^2 S2W Profile Rifle Length Chrome Lined Mil-Spec Heavy Phosphate Coated GAS SYSTEM: User-Adjustable Gas Block CNC Machined of 4140 Hardened Steel and Mil-Spec Heavy Phosphate Coating Rifle Length Direct Impingement MUZZLE DEVICE: Daniel Defense Superior Suppression Device 17-4 PH Stainless Steel Salt Bath Nitride Finished TRIGGER: Daniel Defense Mil-Spec HANDGUARD: Daniel Defense DD5 Rail 15.0 CNC Machined of 6061-T6 Aluminum M-LOK Attachment Type III Hard Coat Anodized RECEIVER EXTENSION: 7 Position 7075-T6 Aluminum BUTTSTOCK: Daniel Defense Buttstock Glass Filled Polymer with Soft Touch Overmolding PISTOL GRIP: Daniel Defense Pistol Grip Glass Filled Polymer with Soft Touch Overmolding MAGAZINES: Accepts All SR-25 Magazines Made in the USA!Specifications: Mounting System: M-LOK Caliber: 7.62 x 51mm / .308 Winchester Muzzle Thread: 5 / 8 A- 24 TPI (Threads Per Inch) Gas System: Rifle Barrel Length: 18" Barrel Profile: S2WA(R) [Strength-to-Weight] Product Weight: 8.6 LBS Length: 35 3/8" - 39" Magazine: Magpul PMAG 20-Round Case: Daniel Defense Full-Latch Impact Plastic Case Manufacturer: Daniel Defense