Features: Platform: MkG Caliber: .45 ACP Operating System: Fixed Ejector Radial Delayed Blowback Barrel Length: 8 Barrel Twist: 1:16 Barrel Contour: MT Barrel Material: 4140CM SBN Barrel Twist: 1:16 Muzzle Device: CMMG ZEROED Linear Compensator Muzzle Thread: 0.578 x 28 Gas Port Location: N/A Gas Block: N/A Upper Receiver: Billet 6061 T6 Aluminum Lower Receiver: MkG Forged 7075 T6 Aluminum Hand Guard: CMMG EML7 M-LOK Finish: Cerakote Standard Charging Handle: CMMG ZEROED Ambi Pistol Grip: CMMG ZEROED Pistol Grip Buffer Type: H AR15 Receiver Extension: CMMG 6 Position Fastback Extension Stock / Brace: CMMG RipBrace Trigger Type: ZEROED Drop-In Single Stage Trigger Guard: Integrated Safety Selector: CMMG ZEROED 60/90 Degree Magazine: Glock 13rd Weight: 4.8 lbs Length: 23.8"