Specifications: PLATFORM: MK3 CALIBER: .308 WIN OPERATING SYSTEM: DIRECT IMPINGEMENT BARREL LENGTH: 16.1 BARREL TWIST: 1:10 BARREL CONTOUR: MT BARREL MATERIAL: 416SS SBN BARREL TWIST: 1:10 MUZZLE DEVICE: CMMG ZEROED MUZZLE BRAKE MUZZLE THREAD: 5/8 X 24 GAS PORT LOCATION: RIFLE GAS BLOCK: 0.750" NON-ADJUSTABLE UPPER RECEIVER: BILLET 7075 T6 ALUMINUM LOWER RECEIVER: MK3 BILLET 7075 T6 HAND GUARD: CMMG EML15 M-LOK FINISH CERAKOTE: STANDARD CHARGING HANDLE: CMMG ZEROED AMBI PISTOL GRIP: CMMG ZEROED PISTOL GRIP BUFFER TYPE: CARBINE RECEIVER EXTENSION: CMMG MK3 6 POSITION FASTBACK STOCK / BRACE: CMMG RIPSTOCK TRIGGER TYPE: MIL-SPEC SINGLE STAGE TRIGGER GUARD: INTEGRATED SAFETY SELECTOR: CMMG ZEROED 60/90 DEGREE MAGAZINE: MAGPUL 20RD PMAG WEIGHT: 8 LENGTH: 34"