Get anything that you don't think she is specifically aware of out of the house. Huh? What? Don't know what you are talking about.
From a person that has been through this 2X, get your firearms out of the house, even if the both of you are still in it.
All it will take is the two of you to have a fight (verbal) and for her to call the police on you and for her to tell the police that you have "a gun", as my ex#2 did to me, it is one of the questions that are asked when 911 is called. They did not ask if I was threatening her with a gun, they just asked her if I had a gun. And with a bunch of them locked in a safe, the dumb beeotch answered the 911 operator yes he has guns.
And of course I am sure you can figure out what happened next and where I was for the next 3 days.
And when I finally got home she had cleaned me out including the bank accounts and must have had some friends try to open the safe (unsuccessfully), because there were major pry marks around the door and the combo dial was knocked off.
Sideshow Bob has an excellent point. Get all of the guns, all of the ammo and the recreational knives out- sort it out later. If you're worried about whether "it" will still be there when you get home- take it first.