Pretty much the final form of what started out as an upgraded starter AC.
The name Jajanken comes from Gon's nen ability in Hunter x Hunter that has 3 attacks based on rock, paper, and scissors. Rock is the pulse blade and main damage dealer. Paper is the missiles for a ranged attack. Scissors is the shotgun for medium range.
Most RR dudes who play online PvP have played this by now. Basically, I kite with missiles and the shotgun while waiting for openings, then I come in with the pulse blade. There are some hard matchups for this, but it has tools to at least put up a fight against most builds.
Edit: Can straight-swap to Zimmerman if needed. But I'm already so used to the reload timing of the Haldeman.