The following weapons were used in the OVA Golden Kamuy:
Revolvers
Smith & Wesson Model 10
The Smith & Wesson Model 10 is used by Kusuda's men in "The Barato Bodyguards".
Smith & Wesson Model of 1899 M&P (1899-1902) - .38 Special
The Model 10s fired at Hidoro-gumi wakashus in "The Barato Bodyguards".
Type 26
The Type 26 is seen with various persons throughout "The Barato Bodyguards".
Japanese Type 26 Revolver - 9mmJR
The Hidoro-gumi matriarch attempts to take out the Type 26 in "The Barato Bodyguards".
Umakichi Kusuda takes out his own Type 26 during a gunfight.
Hidoro-gumi wakashus fire their Type 26s from the alley.
Battle Rifles
Arisaka Type 30
The Arisaka Type 30 is seen with Superior Private Hyakunosuke Ogata and Saichi Sugimoto aka "Immortal Sugimoto" as their primary weapon.
Arisaka Type 30 rifle - 6.5x50mmSR Arisaka
Superior Private Hyakunosuke Ogata aims the Type 30 from a guard tower in "The Barato Bodyguards".
Sugimoto and Ogata with their Type 30s in the "A Life and Death Battle Vs. The Horrifying Deadly Venom! Deep in the Forests of Hokkaido, A Massive Serpent Lurks!" segment of the second OVA episode.
The Type 30 fired at a hostile Ussuri brown bear at the start of "Monster".
The bolt being pulled to extract a used 6.5x50mmSR catridge.
Kiroranke ties a makiri to Sugimoto's Type 30 to use it as a makeshift bayonet.
The Ussuri somehow doesn't mind eating the Type 30...
...and Sugimoto fires the rifle into its brain.
Carbines
Winchester Model 1892
The Winchester Model 1892 is seen with Toshizō Hijikata as his primary weapon.
Winchester 1892 -.32WCF/.38-40/.44-40/.25-20.
Hijikata opens fire on Hidoro-gumi wakashus to create a false flag attack in "The Barato Bodyguards".
Shotguns
12 Gauge Double Barreled Shotgun
A 12 Gauge Double Barreled Shotgun is seen with one of Eddie Dunn's men in "Monster".
Cimarron 1878 Coach Gun - 12 gauge. Credit/courtesy to
Xtreme Props for the image.
The man on the far right with the shotgun at the start of "Monster".
In this shot, you can see the exposed hammers.
Machine Guns
Maxim 1895
The Maxim 1895 is used by Kiichirou Wakayama to kill off the last Ussuri bear in "Monster".
Maxim 1895 on tripod - 7.92x57mm Mauser
Wakayama's war face while shooting the Ussuri from a prototype Model T at the end of "Monster".
Others
Bow
An Ainu bow is seen with Asirpa as her primary weapon.
Asirpa examines the ground for Ussuri tracks in "Monster".