CMMG Mk4 - 6mm ARC - 16.1" - 1:7.5 - Mid-Length - Black

Precision Long-Range Performance with 6mm ARC Innovation

Introducing a game-changer for long-range enthusiasts and tactical shooters, this complete upper receiver group from CMMG brings the cutting-edge 6mm ARC (Advanced Rifle Cartridge) to your AR15 platform. Designed by Hornady, the 6mm ARC offers exceptional ballistic performance, bridging the gap between traditional 5.56 NATO and larger calibers with superior accuracy and reduced recoil at extended ranges. Whether you're engaging targets at the range, competing in precision rifle matches, or hunting medium-sized game in open terrain, this upper assembly transforms your existing lower into a formidable long-range system. Finished in a durable Cerakote Armor Black, it combines rugged reliability with a sleek, professional aesthetic, ensuring it stands up to harsh field conditions while maintaining peak performance.

• Caliber: 6mm ARC, optimized for long-range accuracy and minimal recoil.
• Barrel Length: 16.1 inches, providing a balanced profile for maneuverability and precision.
• Finish: Cerakote Armor Black for enhanced durability and corrosion resistance.
• Compatibility: Designed to seamlessly pair with standard AR15 lower receivers.
• Construction: Engineered for precise manufacturing and long-term reliability in demanding environments.

When it comes to deploying this upper receiver group, timing and application are key to maximizing its potential. Ideal for scenarios requiring precision at distances beyond typical AR15 capabilities, such as long-range target shooting or hunting expeditions in wide-open spaces, this assembly shines during early morning or late evening hunts when visibility and accuracy are paramount. Installation is straightforward—simply pin it to your compatible AR15