This is a semi-auto version of the M10
9mm open bolt SMG built by RPB
Industries. These were built for 5 or 6 years
before they were banned by the
ATF. These are a big pistol, but an interesting
part of U.S. SMG history
Military
Armament Corporation (MAC)
in Powder Springs Georgia started
by Gordon Ingram (who designed and built
the MAC SMG) produced MACs (in
9mm, .45acp, and .380) from 1970-1976
Military
Armament Corporation (MAC)
sold its tooling and assets (registered
and unregistered frames, and parts)
to RPB in 1977. RPB marketed
the MAC as a Semi-Auto open bolt pistol
ATF stopped the
manufacture of open bolt semi-autos in1982. RPB
went out of business in 1983.
S.A.P. M10 cal 9mm par
RPB Industries, Inc Atlanta, GA U.S.A.
SWD started in 1983 and
re-designed the MAC to fire from a
closed bolt