The following weapons were used in the film Ulzana:
Some of US Army officers are armed with Reichsrevolver M1879 revolvers.
The coachman of stagecoach (Wilfried Zander) carries the Colt 1851 Navy revolver. Colt Navy revolvers are also briefly seen in hands of US Army officers. These guns appear to be cartridge version of Colt 1851 Navy, with brass frame and barrel and white cylinder, that are seen in many other DEFA Western movies. The lack of the pin that fixes the barrel with the frame on original Colt 1851 allows to guess that screen guns are versions, originally made for metallic cartridges (rather than converted from cap and ball model), likely of European production.
Smith & Wesson revolver
A revolver in hands of some uncredited character appears to be a Smith & Wesson model, possibly a Smith & Wesson Victory Model that often appears in DEFA Western movies.
Single Action Army
Many characters, notably Wardley (Paul Berndt) and Buuly (Dan Sandulescu), carry holstered revolvers. The grips allow to guess the revolvers to be Single Action Army. The only SAA revolver, seen outside holster, is the "Cavalry" revolver, used by an unnamed Sergeant in the final scene.
Rifles and Muskets
Winchester Model 1892
Anachronistic Winchester Model 1892 rifles are used by Ulzana (Gojko Mitic) and some other characters. Most, if not all Winchesters are fitted with sling swivel on the underbarrel magazine, so these carbines are not Saddle Ring version.
Martini Action Schuetzen Rifle
Most rifles in the movie are single shot Martini Action Schuetzen rifles, popular German target and hunting guns. They are used by both US Army soldiers and Apache warriors.
Kessler Schuetzen Rifle
Kessler Schuetzen rifle is seen in hands of an Apache warrior. Kessler system was an improved version of Martini.
Aydt Schuetzen Rifle
Some Aydt Schuetzen rifles are also seen.
Mauser Schebenbüchse Rifle
What appears to be a Mauser Scheibenbüchse, bolt-action target rifle based on Mauser Gewehr 1871 system, is seen in hands of an Apache warrior.
A full-length infantry Martini-Henry rifle is seen in hands of a soldier. It slightly differs from standard British guns of this pattern. Possibly this gun was originally of Romanian or Ottoman pattern.
Percussion Cap Musket
What appears to be percussion cap muskets (possibly rifled muskets) are seen in hands of soldiers.
A Napoleonic-style smoothbore field cannon is seen in the fort. Its size matches 12-pounder.