If they were originally made for the government, then it would make sense to make them M2 housings so they could be used in Viet Nam for rebuilding and such with the M2 being a hot item at that time.
If they were originally made for the government, then it would make sense to make them M2 housings so they could be used in Viet Nam for rebuilding and such with the M2 being a hot item at that time.