So I'm looking to buy and X5 but don't know the differences between the models anyone have some insight and can point or recommend one or your experiences with one

Hi Everyone, Quick question regarding a new Sig X5 competition. I just got back from my FFL to inspect my firearm that arrived today and the unit looks like it's been through some substantial use. The barrel has significant wear from the slide and the firearm itself has a good amount of dirty...