Companeros (original title Vamos a matar, compañeros) is a 1970 Italian-Germanan-Spanish spaghetti western directed by Sergio Corbucci and starring Franco Nero and Tomas Milian. The story takes place during the Mexican Revolution. Swedish arms dealer Yodlaf Peterson (Franco Nero) sells weapons to guerilla leader Gen. Mongo (José Bódalo) but the money that Mongo needs for the deal are locked in an indestructible bank safe. The only man who knows the combination is Prof. Xantos (Fernando Rey) who is held in prison in American town of Yuma. Peterson volunteers to rescue Xantos and bring him to Mongo who orders one of his men, El Vasco (Tomas Milian), to escort Petersen. The events are even more complicated after the involvement of a group of Xantos' loyal followers ("Xantists"), lead by Lola (Iris Berben). Meanwhile Petersen's old companion John (Jack Palance), turned bitter enemy, searches for him.
The following weapons were used in the film Companeros:
Single Action Army revolvers are used by numerous characters. Both "Artillery" and "Cavalry" models can be seen. The revolvers appear to be Italian-manufactured replicas, as in most Spaghetti Westerns.
During the encounter in train one of Xantists is armed with a revolver that looks mostly like a Smith & Wesson .44 Double Action or one of its numerous Spanish copies. The revolver has an unusal feature, a side-mounted ejector rod that is uncommon for top-break revolvers. Maybe this ejector rod is a pure mockup, added to make the revolver look more "Western-style". In the final scene El Vasco (Tomas Milian) also carries such revolver.
Colt New Pocket
A compact nickel plated revolver is carried by Yodlaf Peterson (Franco Nero) in several scenes. It looks similar to Colt New Pocket except for more vertical front end of the frame; such simplification may be a sign of a Spanish produced version of Colt revolver.
Double Barreled Pistol
In the scene in train Lola (Iris Berben) wields a pair of double barreled pistols. They appear to be large caliber smoothbore hunting pistols, some distant cousin of Howdah Pistol.
Campo Giro
A Campo Giro pistol is another of Yodlaf Peterson's (Franco Nero) handguns. During the encounter in train it is taken from Peterson by a young Xantist.
Rifles
1893 Spanish Mauser
Mexican government soldiers and some guerrillas are armed with 1893 Spanish Mauser rifles. In the scene in Yuma US Army soldiers also are armed with M1893 rifles, standing for proper M1903 Springfields.
Several Maxim 1895 machine guns are seen in Peterson's boxcar. Later one of them is used by Mongo's men in an attempt to open the safe. During the shootout on the road block a Maxim on a tripod is seen; when Peterson takes it, it switches to a multi-barrelled mitrailleuse (see below).
Maxim 1895 Mockup
General Mongo's men attempt to break the safe using a Maxim that appears to be a mockup as it is fired from hands and operated in a very strange way. Later on in the climatic battle, Peterson takes the gun and uses it against Mongo's men. There is a possibility that this prop is made around a submachine gun, like Star Z45, widely available in Spain.
Bergmann MG 15nA
A Bergmann MG 15nA machine gun is also seen in Peterson's boxcar.
Fake Mitrailleuse Machine Gun
An iconic Spaghetti Western gun, a multi-barrelled, belt-fed mitrailleuse-style machine gun, appears in the scene on the road block. Yodlaf Peterson (Franco Nero) dismounts it from a tripod (in previous moment the gun is a Maxim machine gun) and mows down Mexican government soldiers. This movie prop looks very similar to the one, seen in A Fistful of Dollars and different from the one, hold by Nero in Django.