"They carried old military guns save for one who had a buffalo rifle"

Buffalo rifles were large-calibre, generally single-shot black powder cartridge firearms which were used to hunt the buffalo to near-extinction in the late 19th century. The three most popular types of rifles used by professional buffalo hunters were the Springfield Riflle, Remington No. 1, and Sharps rifle.

 

Springfield Model 1855 rifle
Creative Commons Attribution Share AlikeSpringfield Model 1855 rifle - Credit: Antique Military Rifles