CMMG Mk4 5.56X45mm NATO Resolute Upper Group Receiver 16.1in Titanium 55BC7C3-TI. 5 this is the shortest 5.56mm upper group CMMG offers. Great for anyone looking to build an ultra-compact AR15 thats lightweight and perfectly sized to go anywhere. This...
CMMG Mk4 5.56X45mm NATO Resolute Upper Group Receiver 16.1in Titanium 55BC7C3-TI. 5 this is the shortest 5.56mm upper group CMMG offers. Great for anyone looking to build an ultra-compact AR15 thats lightweight and perfectly sized to go anywhere. This...