CMMG Resolute MK4 300 Blackout Upper Receiver, 16.1" Barrel, M-LOK Free-Float Handguard, Armor Black - 30BC40AAB

AR-platform upper receiver chambered in 300 Blackout with a 16.1" barrel and M-LOK free-float handguard finished in Armor Black. This upper does not include bolt carrier group or charging handle. Features a modular design compatible with standard AR-15 platforms and accepts M-LOK accessories.