Brent, Bought this in Texas, but I later found out these M7 cast aluminum knuckle handles were made by John T. Graham of Ft. Wright, Kentucky. Maybe the mid 1970's. Mr. Graham was trying to get a Government contract for them, which did not happen. He passed in 1988, so any additional information was lost. My M7 Milpar Knuckleduster was never painted. Most of these were painted black to match the other side of the original grip slab. Yes, even with the knuckleguard it will still mount to an M-16.