The Black Scorpion
The following weapons were used in the film The Black Scorpion:
When Hank Scott (Richard Denning) and Artur Ramos (Carlos Rivas) find the dead policeman, Sergeant Vega, Vega is still clutching an M1911 pistol. Later dialog calls the clearly automatic handgun "Vega's revolver."
Smith & Wesson Military & Police
Both Scott and Ramos carry Smith & Wesson Military & Police revolvers. Ramos' has an engraved pearl handle.
Soldiers carry M1903 Springfield rifles.
Light Machine Gun
Mendoza M1934 LMG
During the giant scorpions' attack on San Lorenzo, Major Cosio (Arturo Martínez) fires a Mendoza M1934 at one of the creatures. Later when he and Scott descend into the scorpions' underground lair, Ramos carries and uses the rifle.