LITTLE KNOWN FACTS ABOUT COLT MONOLITHIC UPPER 11.5 FOR SALE.

Distinctive direct gasoline running process gets rid of the conventional operating rod and results in fewer and lighter elementsBe aware:  The Colt LE6940 family of uppers are proprietary made, with couple of consumer serviceable elements. Specific tools are necessary to remove the barrel nut and barrel.  The fuel technique is unique rather than