Bought a used one from a local shooter . Since I have no knowledge of guns history should I just replace all the springs ? Also is there somewhere I can find reccomended maintainance & lubrication guide ? I did notice that I can put gun in my hand & move my arm back & forth ( like I'm trying to poke something with the muzzle ) & can feel slide starting to unlock this is w/o a mag inserted . I just called Walther & ordered a new RSA . I'm thinking spring has weakened to point it's not hold ing slide in battery as it should . What say you Gents . BTW s/n is FAW99XX if someone can guesstimate DOB .