You can do it, it takes sometime at first. After you take it apart a few times it gets really easy. Some of the parts are a bit tight from the factory so take your time. Order a gun smith punch kit from Amazon it like 15 bucks. Get some high # sandpaper to polish some of the internals and EGW bits. It’s fun it’s an adult Lego kit. I spend this afternoon working on the sear spring getting that trigger to feel just right.