Bullpup

He sees thou art the best man for the swamp; that thy scent is keen with the bloodhound, thine eye like the hawk's, and thou art quick for fight as the colonel's bullpup.

Source: wiktionary

He brought with him the holsters of his young master, wrapped up in the fragment of a blanket. “I tink, Mass Willie,” said he, “dat you better hab dese little bullpups yer, onder you own han'. Dere's no telling how soon you may want 'em. De swode is good 'nough, when you hab dem tory in chopping reach, but de pups kin keep guard on door and winder.”

Source: wiktionary

"Gone for his two little bull-pups," said Stubbs. That was what the Parson called his silver-mounted derringers.

Source: wiktionary

In an Iowa murder case two witnesses swore to seeing the defendant forty rods off draw his revolver, when it was proven that they were so near-sighted that they could not tell a pistol from a bull-pup fifteen rods away.

Source: wiktionary