I collect some US military and am troubled by the lack of proper markings. Should the gun also have a small bursting bomb cartouch somewhere? Add in the aftermarket grips and I'm losing my nerve fast. Perhaps a guarantee of a factory letter stating it was indeed shipped to the USAF as a condition of sale?

I also do not understand what made this a model 56 as opposed to a M-15? These were certainly not the ones withthe aluminum cylinders. So what "specifications" did the AF demand?