CMMG Mk4 .300BLK Resolute Upper Group Receiver 16.1in Midnight Bronze 30B12BB-MB. Whether youre looking to swap your current AR15 upper to quickly switch to 300BLK or looking to top off a new build this 8 BANSHEE upper group is sure to satisfy anyone...
CMMG Mk4 .300BLK Resolute Upper Group Receiver 16.1in Midnight Bronze 30B12BB-MB. Whether youre looking to swap your current AR15 upper to quickly switch to 300BLK or looking to top off a new build this 8 BANSHEE upper group is sure to satisfy anyone...