CMMG 30B12BBAB Resolute MK4 5.56 NATO 16.1" Rifle

The CMMG 30B12BBAB Resolute MK4 300 Blackout 16.10", Armor Black, M-LOK Free-Float Handguard for AR-Platform provides a turnkey solution for shooters looking to leverage the ballistic advantages of the .300 Blackout cartridge in a full-length rifle configuration. Designed for seamless integration with standard AR-15 lowers, this upper group is ideal for those transitioning from 5.56 NATO to a caliber with superior energy retention and suppression capabilities. Whether you are building a duty-ready rifle or a specialized hunting platform, the Resolute series offers the reliability required for high-stakes environments.

This upper group features a 16.10-inch barrel that maximizes velocity while maintaining the maneuverability expected of the AR platform. The M-LOK free-float handguard ensures that your barrel's harmonics remain undisturbed, providing consistent accuracy and plenty of real estate for mission-essential accessories like lights and lasers. Finished in a durable Armor Black coating, the assembly is built to withstand the rigors of field use and harsh environmental conditions. The inclusion of a full-length top rail allows for the secure mounting of optics and backup iron sights for a complete sighting solution.

Operators looking for a versatile platform will find that the CMMG 30B12BBAB Resolute MK4 300 Blackout 16.10", Armor Black, M-LOK Free-Float Handguard for AR-Platform excels in both suppressed and unsuppressed roles. Its compatibility with the standard Mk4 (AR-15) lower receiver makes it a cost-effective upgrade for existing kits, requiring only a simple pin-on installation to be range-ready. This configuration is particularly beneficial for professionals who demand the stopping power of a .30 caliber projectile without the weight or recoil of a traditional large-frame rifle.