I discovered many versions After i appeared. Some were being marked M-16A1, and some were being marked M16A1. Some experienced SERIAL in fact stamped on there before the serial quantity, and Many others did not. However, I'm on journey so I am unable to submit pics of your bolt.  It can be MPC engraved.  The only real marking around the carrie

At first Posted By barniicz: Howdy, Thanks for The solution. I'm sorry, but I have not determined ways to add pictures. These weapons I have hardly ever seen the shelves of our merchants. There were weapons of contemporary companies - Dlask, Proarm Armory, Norinco ap., But not Colt M16A1. I feel it absolutely was a really restricted source of lates