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 six different Cerakote finishes all CMMG® Upper Groups come complete with bolt carrier group and ZEROED™ accessories including:
- ZEROED AR15 Polymer Dust Cover
- ZEROED AR15 Ambi Charging Handle
- ZEROED Muzzle Brake 5.56mm
- Radial Delayed Blowback™ Operating System
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