The following guns were used in the film:
File:OUTIWcover.jpg Once Upon a Time in the West (1968)
Single Action Army Seen in the hands of Harmonica (Charles Bronson ), Frank (Henry Fonda ), and Cheyenne (Jason Robards ), as well as many other charcters are Single Action Army revolvers in various barrel lengths and finishes.
Error creating thumbnail: File missing Colt Single Action Army w/ 7.5" barrel. (Used by Henry Fonda and Charles Bronson in film, with nickel finish.) Error creating thumbnail: File missing Colt Single Action Army w/ 5" barrel. (Used by Jason Robards in film, with blued finish.) Error creating thumbnail: File missing Frank uses his nickel 7.5" Cavalary model Single Action Army to murder a young boy in cold blood. Error creating thumbnail: File missing Cheyenne takes Harmonica's blued 5" Artillary SAA and rolls it to him,Harmonica declines Cheyenne's challenge. Image:OUTIWSAA-3.jpg|thumb|none|600px|A man in the bar shoots Cheyenne's wrist restaints with a blued Cavalary SAA.]]
Error creating thumbnail: File missing Frank points his SAA at at Harmonica when he attempts to sneek on the train. Error creating thumbnail: File missing A thug on the train searches for Cheyenne with a 5" SAA. Error creating thumbnail: File missing Frank fires his SAA in the town. Error creating thumbnail: File missing Frank holding his SAA during the showdown with Harmonica. "Mare's Leg" Stoney (Woody Strode ) uses a sawed down Winchester Model 1892 rifle, nicknamed "Mare's Leg" as his weapon of choice. The gun has a trigger pin attached to the lever for rapid fire, meaning he uses it more as a quick draw gun than for accuracy.
Error creating thumbnail: File missing Sawed-off Winchester '92 pistol "MAre's Leg" - .44-40. Error creating thumbnail: File missing Stoney checks the chamber on "Mare's Leg". Error creating thumbnail: File missing Stoney loads up his Winchester '92 pistol. Winchester 1892 Saddle Ring Carbine Aside from Stoney's pistol version, several thugs and assassin's throughout the film are armed with Winchester 1892 Saddle Ring Carbines .
Error creating thumbnail: File missing Wincheser 1892 Saddle Ring Carbine. Error creating thumbnail: File missing Two assassins ready their Winchester 1892 Saddle Ring Carbine rifles to face Harmonica. Error creating thumbnail: File missing Cheyenne with a '92 Carbine in hand. Error creating thumbnail: File missing An assassin armed with a '92 Carbine. Error creating thumbnail: File missing The same assassin takes aim through a hole in the billborad with his '92 carbine. (the hole keeps changing location throughout the scene. Error creating thumbnail: File missing A '92 carbine lays on the ground near the train wreckage as Frank investigates. Double Barreled Black-Powder Shotgun The father is seen using a Double Barrel shotgun to shoot quail with his son. It is noted as a black powder shotgun based on the ram rod positioned under the barrel. Jill McBain (Claudia Cardinale ) is also seen using the Side-by-side black-powder, and uses it to fire a shot a torch wielding assassin in the dark.
Error creating thumbnail: File missing 12 gauge Stevens 1878 with exposed hammers. This model is a cartridge firing gun, the model in the film is a percussion muzzle loader. Error creating thumbnail: File missing The father takes aim at some quail with the shotgun. Note underslung ram-rod. Error creating thumbnail: File missing Jill fires the shotgun into the dark. Note how both the percussion cap and the muzzle are shown fired. Error creating thumbnail: File missing The shotgun mounted on Jill's wall. 
