Not the best gun. It is the best Rocket Launcher in the game. Which is not saying much unless you got an active burn modifier helping it just isn't what it was before. Sleeper is a DPS machine now as long as there is a Crit and can hold 12 shots with extra heavy ammo perks on chest pieces. Ghally will probably only be able to hold 8 at most and have far less damage per shot on one target. Ghally is still gonna be a monster at clearing hordes of enemies in close proximity to each other but just will not be able to cut it against bullet sponges like it used too.