CMMG Resolute 300 Mk57 Radial Delayed Blowback Upper Receiver Assembly AR-15 5.7x28mm 16" Barrel
- Product Family #: 1022345450
- Product #: 191470
- Manufacturer #: 57B3F65
- UPC #: 816422029686
The CMMG Resolute 300 5.7x28mm upper receiver has a 16.1-inch barrel and features CMMG’s patented Radial Delayed Blowback operating system. The receiver and hand guard are hard coat anodized and come with a pre-installed CMMG ambidextrous charging handle, CMMG SV Brake and a CMMG RML15 M-LOK Hand Guard.
- CMMG RML15 M-LOK Hand Guard
- CMMG’s patented Radial Delayed Blowback
- CMMG Oversized Ambi charging handle
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