I bought this kit new, and installed it in a brand new Aero Precision lower receiver. Before I ever fired the weapon, I changed my mind on CMMG, and replaced it with Colt parts. So the parts have wear marks from being installed, but I never fired the weapon with these parts in it. I'm asking $30.00. I also have a mil-spec ATI buffer tube, carbine buffer, and carbine spring for sale at $10.00. It also have a couple idiot marks, but functions just fine. Send a PM if interested. Thanks!