little gunsmith info

[LRRPF52]

I have a bolt carrier that I want to put a POF roller cam pin in. The trouble is I need to remove the gas key screws to install the modified gas key that the roller requires. The staking only pushed metal against the screw heads not over their edge. I thought that even though the screws were staked this way they could be broken loose and though difficult backed out. Only problem is they won't even break loose. Anyone have any suggestions.

I just started with a new carrier, a chromed one, to be exact, so it would match the POF key and roller cam. I'm not so sure the roller cam adds any benefit to the system, since you have a single point of bearing from the roller, versus a flat surface from the standard cam pin.

Colt actually was putting this on the AR-10A back in the 1959-1960 time period, and had tooled up to start mass-producing AR10A's. When they received word from their marketing partners to stop production on the AR-10A, and start cranking out AR15's, the die was cast for the future. This was in response to the reception that the AR15 was getting over the AR-10 during the world tour demonstrations being done at the time, especially in the Asian Pacific region.



Are you attempting this modification on a chrome or phosphated carrier? Doesn't really matter, just asking.