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...

In stock
  • ShipAmount
  • $0.00
  • RevType
  • 2
  • Manufacturer
  • CMMG
  • Sku
  • 30B12BBMB
  • Identity
  • 21836663153

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