If someone breaks in to your home, you need one gun to defend yourself and end the life of the criminal. You need the other gun to plant on them to prove you had good cause to kill them. This second gun should be a cheap-ish pistol, utterly clean of your prints and DNA, and loaded with bullets you’ve never actually touched and have no more of in the house. Obviously there should be no paperwork linking this gun to you. Yes there are ways to clean a gun and store it such that no trace of you exists on it. And if it’s ever claimed that your DNA is on the gun, it clearly got there in the scuffle. I live in an absolute liberal mecca. I will not tolerate criminals desecrating my home or threatening my family. If ever this nightmare scenario should come to pass, cops will see me, the upstanding homeowner (tax payer) defending myself from a criminal with a gun. Pretty much case closed. I’m sure others will have good advice about this and I want to hear it. This is just my humble opinion. Oh - and don’t think an 80% gun is t linked to you unless you bought the entire kit for cash.