That's our problem isn't it, finding people who have read the constitution and understand it. Lot's of interesting responses, Sam Adams had a pretty sharp idea, he'd double his investment in .50 ammo I suspect. I think I'd concentrate on ammo and mags for widely used military type semis, AR15, M1A, FAL and AK. Likely to be parts and such available somewhere somehow. The Ruger 10/22 mag comment was also a good idea, need to check on what the best mags are. Then case lots of appropriate ammo followed by reloading components. I'm still not sure about the .50 although the receiver might be a good start.