CMMG Mk4 .300BLK Banshee Upper Group Receiver 12.5in Midnight Bronze 30B8A6F-MB. With the 12.5 BANSHEE upper group you can build your next 300BLK AR with character like no other. Specifications for CMMG Mk4 .300BLK 12.5in Banshee Upper Group...
CMMG Mk4 .300BLK Banshee Upper Group Receiver 12.5in Midnight Bronze 30B8A6F-MB. With the 12.5 BANSHEE upper group you can build your next 300BLK AR with character like no other. Specifications for CMMG Mk4 .300BLK 12.5in Banshee Upper Group...