Series/Collection: Resolute 300
Caliber: 5.7x28mm
Material: 416 Stainless Steel Barrel, 7075 T6 Aluminum Receiver
Finish: Hardcoat Anodized
Color: Black
For Use With: MK57 Style Rifle
Includes: SV Muzzle Brake, RML15 M-Lok Hand Guard, 416SS Barrel, Ambi Charging Handle
Dimensions: 25.3" L
Weight: 4 lb 6 oz
Barrel Length: 16.1"
Twist Rate: 1:9
Barrel Type: Medium Taper
Muzzle Type: SV Brake

Features

The Resolute 300 5.7x28 mm upper receiver has a 16.1 inches 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 ambi charging handle, CMMG SV brake and a CMMG RML15 M-LOK hand guard.

Features:

All of our upper groups come complete with BCG
CMMG RML15 M-Lok hand guard
Hardcoat anodized receiver and hand guard finish
SV brake, threaded 1/2-28 muzzle

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Shipping Restrictions

It is the customer’s responsibility for understanding state laws regarding all purchases made. For a comprehensive list of all Shipping Restrictions, please refer to our Shipping Restrictions By State Page found Here.

All NFA Rules Apply

These items are controlled by the U.S. Government and authorized for export only to the country of ultimate destination for use by the ultimate consignee or end-user(s) herein identified. They may not be resold, transferred, or otherwise disposed of, to any other country or to any person other than the authorized ultimate consignee or end-user(s), either in their original form or after being incorporated into other items, without first obtaining approval from the U.S. government or as otherwise authorized by U.S. law and regulations.

Local Law Compliance

Certain firearm parts and accessories, including AR-style upper receivers, are subject to complex and frequently changing federal, state, and local laws and regulations. While an upper receiver may be lawfully sold and shipped as a component, the legality of possessing, assembling, configuring, or using an upper receiver in certain states (e.g., California, Washington State) and localities depends on how it is assembled, combined with other components, and ultimately used. You are solely responsible for ensuring that any assembly, configuration, possession, or use complies with all federal, state, and local laws, including any so-called “assault weapon” bans and short-barreled rifle restrictions. We do not provide legal advice and are not responsible for unlawful configurations or uses.