|Operating System||Radial Delayed Blowback|
|Barrel Material||4140CM, SBN|
|Muzzle Device||CMMG ZEROED Muzzle Brake|
|Muzzle Thread||1/2 x 28|
|Gas Port Location||N/A|
|Upper Receiver||Billet 6061 T6 Aluminum|
|Hand Guard||CMMG EML15 M-LOK|
|Charging Handle||CMMG ZEROED Ambi|
AR Parts Notice - State/local restrictions may apply in CT, DC, IL, MA, NJ, NY, or WA. Customers must review our Shipping Policy prior to ordering.
UPPER GROUP, RESOLUTE, 5.7X28MM, 16.1"
Personal defense calibers like 5.7x28mm have become a big thing in the last few years, and if you’re looking for PDW ballistics and the classic style and balance of a carbine then you’re in luck. Combine this RESOLUTE® Upper Group with either our Mk57 Lower or a standard AR15 lower group and CMMG®’s 5.7 AR Conversion Magazines and you’ll be ready to hit the range! Available in seven different Cerakote finishes, all CMMG® Upper Groups come complete with bolt carrier group and ZEROED™ accessories including:
Originally developed for the .45 ACP MkG platform, CMMG has adapted our Radial Delayed Blowback system across our pistol caliber lineup to create pistols and rifles with a softer recoil impulse and reduced bolt weight compared to traditional straight blowback systems. Check out our CMMG Resources article & video to learn more about what sets Radial Delayed Blowback apart.
We aim to please, that’s why every CMMG product is backed by our Lifetime Quality Guarantee against material and workmanship defects. Learn More.