Moe carries an unknown type of Sharps Carbine in the episode "Rockin' Thru the Rockies" (1940). Curly also uses the rifle to accidentally shoot three ducks with one shot.
Curly uses a Krag-Jørgensen rifle in the episode "Spook Louder" (1943).
Error creating thumbnail: File missingUS Property Marked Krag-Jørgensen Model 1896 Rifle - .30-40 KragError creating thumbnail: File missingCurly demonstrates the Krag-Jørgensen rifle, saying "This is the front end, this is the back end, this is the gimmick you pull." The Krag's unique side loading magazine is clearly visible in this scene.
Winchester 1894
The Winchester 1894 appears in both "Dizzy Pilots" (1943; used by Curly) and in "Guns-a-Poppin" (used by Moe).
Larry, Curly and Moe are issued Trapdoor Springfield Rifles in "Boobs in Arms" (1940). The Springfield is also used heavily in "Uncivil War Birds" by just about everyone.
Curly uses an unidentified double barreled shotgun in "Dizzy Pilots" (1943) after Larry points out he might miss with the rifle. A couple are also used by Larry and Curly in "Idiots Deluxe" (1945) for trying to deal with a loose bear.
Larry uses a Winchester Model 1897 in "Shot on the Frontier" (1954). Unfortunately he mistakenly loads hot dogs rather than shells when acquiring it. Moe also uses a Winchester Model 1897 in "A Ducking They Did Go" (1939).