The CMMG 45A250FAB, chambered in the classical .45 ACP calibre, introduces the .45 calibre bore to the ultra-compact, bufferless Dissent platform. The PDW size of the Dissent MkG, which has no need for a buffer tube, makes it a go-to tool for various applications. The product details are as follows: Platform: MkG Caliber: .45 ACP Operating System: Compact Action-Radial Delayed Blowback Barrel Length: 6.5 Barrel Twist: 1:16 Barrel Contour: MT Barrel Material: 4140CM SBN Muzzle Device: CMMG Zeroed Linear Compensator Muzzle Thread: 0.578 x 28 Upper Receiver: Dissent PCC 7075 T6 Aluminum Lower Receiver: MkG Forged 7075 T6 Aluminum Hand Guard: CMMG 5.5 Proprietary Finish: Cerakote Charging Handle: Dissent Side Charger - Reversible Pistol Grip: CMMG Zeroed Pistol Grip Receiver Extension: 1913 Picatinny Rail End Cap Trigger Type: Zeroed Drop-In Single Stage Trigger Guard: Integrated Safety Selector: CMMG Zeroed 60/90 Degree Magazine: Comes with two (2) 13-round Glock magazines Weight: 4.9 lbs Length: 15.7 inches All these comprehensive features encompass a dependable and compact firearm, perfect for any .45 ACP enthusiast.