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 dont 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 thats 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.