EXAMINE THIS REPORT ON COLT 6945 UPPER FOR SALE

the 6940 piston rilfe was virtually a dud.  For my part, It's not at all worth repairing.  A handful of blew a hold extensive open during the receiver.  It absolutely was a good idea, which was not well examined, and never ever took off. Honestly, I wouldn't shoot a person.  Time to move on to a whole new rifle.  Get an LMT or HK if you like