CMMG AR-15 Resolute 300 Mk57 Radial Delayed Blowback Upper Receiver Assembly 5.7x28mm 16" Barrel M-LOK Handguard

• Experience PDW ballistics and the classic style of a carbine with the CMMG AR-15 Resolute 300 Mk57 Upper Receiver Assembly.
• Enjoy the versatility of combining this upper group with either our Mk57 Lower or a standard AR15 lower group.
• Get ready to hit the range with the included ZEROED accessories, such as the AR15 Polymer Dust Cover and Ambi Charging Handle.

Looking for a personal defense weapon that combines power and style? Look no further than the CMMG AR-15 Resolute 300 Mk57 Upper Receiver Assembly. With its 5.7x28mm caliber, this upper group delivers PDW ballistics while maintaining the classic balance of a carbine.

What sets this upper group apart is its compatibility with either our Mk57 Lower or a standard AR15 lower group. Simply pair it with CMMG's 5.7 AR Conversion Magazines, and you'll be ready to hit the range with confidence.

But it's not just about functionality. The CMMG AR-15 Resolute 300 Mk57 Upper Receiver Assembly also boasts six different Cerakote finishes, allowing you to choose the one that suits your style best. Whether you prefer a sleek and stealthy look or a bold and vibrant finish, we've got you covered.

And let's not forget about the accessories. With every CMMG Upper Group, you'll receive a bolt carrier group and a range of ZEROED accessories to enhance your shooting experience. From the ZEROED AR15 Polymer Dust Cover to the ZEROED Ambi Charging Handle, we've thought of everything to make your shooting sessions smooth and convenient.

In terms of performance, this upper group features a radial delayed blowback operating system, ensuring reliable and precise operation. The 16.1-inch barrel with a 1:9 twist and MT contour is crafted from 4140CM SBN, guaranteeing durability and accuracy shot after shot.

To top it off, the CMMG AR-15 Resolute 300 Mk57 Upper Receiver Assembly includes a CMMG ZEROED Muzzle Brake, effectively reducing recoil and muzzle rise for improved control.

Crafted from billet 6061 T6 aluminum, the upper receiver is not only lightweight but also built to withstand the rigors of any shooting environment. The CMMG EML15 M-LOK handguard provides a sturdy and ergonomic grip, allowing for easy attachment of accessories.

With a weight of just 4.0 lbs and a length of 25.3 inches, this upper group offers a perfect balance between maneuverability and stability.

Upgrade your AR15 with the CMMG AR-15 Resolute 300 Mk57 Upper Receiver Assembly and experience the power, style, and reliability you deserve.