Chromedog hit the nail on the head. If you can get enough of the dire avenger pistol (or left-hand avenger shuri) and sword arms, they'll work just as good, but are a little larger.
Alternately, the High Elf archer sword arms work pretty good too, especially when paired to the archer bow arms (with the bow cut away) to hold
shuriken catapults that have been cut down to pistols. Very affordable to get the bits from an ebay bits service.