A while ago I bought a used Mossberg 590 cause it was cheap, and I figured I needed a good shotgun ASAP. (I currently live in the city ) I knew it was not the military spec A1 version, but I thought I'd be able to just find used A1 parts to put on it. Well now that I'm looking for a heavy barrel and a metal trigger housing, it's not that easy. I have a gunsmith friend that will probably be able to find them, but I was wondering if any of you know a good place to get stuff like that. Any suggestions would be appreciated. Thanks!