Easily one of the most iconic pistol calibers in the world with more than a century of faithful use .45 ACP has been a go-to choice for shooters looking for a proven heavy-hitting round. Not only does the MkG RESOLUTE® come chambered in this renowned caliber but it also makes use of commonly found and trusted Glock-pattern .45 ACP magazines and spurred the invention of our legendary Radial Delayed Blowback operating system years ago. – When full-size rifles are too cumbersome and pistols/SBRs don’t deliver the long-range ballistic performance you need the CMMG RESOLUTE line of carbine length rifles is the answer. Fitted with the suite of ZEROED parts and accessories as well as our legendary RIPSTOCK the RESOLUTE is the rifle that’s never out of place. The new EML 15 handguard brings style to the next level. M-LOK® attachment slots are found where expected at the 3 6 and 9 o’clock positions as well as on top at 12 o’clock with the omission of a full-length Picatinny section found on our previous handguard. This reduces weight while the additional M-LOK section still gives shooters a place to mount those must-have accessories. With a range of choices just pick the caliber you need for the job and let your rifle do the talking. – Platform MkG – Caliber .45 ACP – Operating System Radial Delayed Blowback – Barrel Length 16.1 – Barrel Twist 1:16 – Barrel Contour MT – Barrel Material 4140CM SBN – Barrel Twist 1:16 – Muzzle Device CMMG ZEROED Muzzle Brake – Muzzle Thread 0.578 x 28 – Upper Receiver Billet 6061 T6 Aluminum – Lower Receiver MkG Forged 7075 T6 Aluminum – Hand Guard CMMG EML15 M-LOK – Finish Cerakote – Charging Handle CMMG ZEROED Ambi – Pistol Grip CMMG ZEROED Pistol Grip – Buffer Type Carbine – Receiver Extension CMMG 6 Position Fastback w/Ambi Sling Plate – Stock / Brace CMMG RipStock – Trigger Type ZEROED Drop-In – Trigger Guard Integrated – Safety Selector CMMG ZEROED 60/90 Degree – Magazine Glock 26rd – Weight 6.0 lbs – Length 32.5