Out of stock
SKU: 156349
UPC: 810103473430
MPN: 30BC40AMB
The CMMG 30BC40AMB Resolute MK4 300 Blackout 16.10" upper receiver assembly is designed for shooters who demand subsonic rifle capability in a compact package. This mid-length upper is ideal for close-quarters operations, home defense, and specialized law enforcement applications, providing the ballistic advantages of .300 Blackout without the length penalty of a full-size platform.
Built on CMMG's proven Resolute platform, this upper features a free-floating M-LOK handguard that minimizes barrel contact, reducing point-of-impact shifts during sustained fire and enhancing accuracy. The 16.10" barrel length allows for flexibility in using both supersonic and subsonic ammunition types, while the Midnight Bronze Cerakote finish provides aesthetic appeal and corrosion resistance against moisture and chemicals.
This upper receiver assembly weighs 3.92 lbs, favoring rapid target acquisition and reducing shooter fatigue during extended operations. It is compatible with AR-15 platforms and allows for modular accessory mounting without impacting barrel performance. Please note that this product does not include a bolt carrier group or charging handle, which are required for operation.
WARNING ⚠️ You must be 18 or older to purchase shotgun or rifle ammunition and 21 or older to purchase handgun ammunition and firearms. Please reference our requirements for ammunition orders to "restricted" states HERE. Always make sure you use the correct ammunition for your firearms. Ammo cannot be shipped to a PO Box. Please reference state & local laws before making a firearm or ammunition purchase.
