後装式

Also known as breech-loading gun, breech-loading weapon, breech loader

right|thumb|A Springfield Model 1888 rifle with its breech open. right|thumb|Schematic of various forms of locking on breechloading firearms. A breechloader is a firearm or artillery piece in which the user loads the ammunition from the breech (rear) end of the barrel. The vast majority of modern firearms are breech-loaders.