wanted to make a quick guide so to get the super rare weapons make sure you have a lot of battle points first off and just keep going into the store and looking for the three weapons listed . the names of the guns are as followed Muramasa is a sniper rifle, Pale Rider is a revolver that looks like an elephant gun and Drake is a double-barrel shotgun that looks like a dragon. if you don't see it there just back out to were you can pick stage shop etc. and keep going into the shop once you see one of these weapons pop up in the store purchase it and the trophy will unlock