The firearms used in the 1990 film Air America include the following...
M16A1
M16A1 with 20 round magazine - 5.56x45mm. What distinguishes it from the original M16 was the addition of a raised rib around the magazine release button, changing of the forward Receiver pins, and the addition of the forward assist button on the upper receiver.
M1911A1 pistol
World War 2 issued Colt M1911A1 Pistol - .45 ACP.
M60 machine gun
M60 machine gun 7.62x51mm NATO
M1 Garand
M1 Carbine
Uzi submachine gun
AK-47
PPS-43
Unknown Rifle/Shotgun
Flintlock Rifle