The Collaborative International Dictionary of English v.0.48:
Breechloader \Breech"load`er\, n. A firearm which receives its load at the breech. [1913 Webster] For cavalry, the revolver and breechloader will supersede the saber. --Rep. Sec. War (1860). [1913 Webster]WordNet (r) 3.0 (2006):
breechloader n 1: a gun that is loaded at the breech