here's the way I see it: the current president and his administration, along with the outgoing democratic majority rule in the senate, have all combined to greatly increase the value of AKs and ARs. Yes, it's been a little bit of paranoia on the American consumer's part to go ahead and buy a semi-auto rifle, even if you are not a gun enthusiast.
Much will be determined in the next presidential election. If, for example, Hillary is elected then I see guns and gun companies as a good investment. If, on the other hand, a republican and/or conservative is elected then I see guns in general, and especially the cheaper stuff like AKs leveling off and even going down in value.
Ammo is always going to be the key. The feds will absolutely cut off the ammo supply before the gun supply. What good is a gun if you can't shoot it? Trust me on this, if you want to invest in something for long term value, invest in ammo and/or reloading stuff. A big ole AK looks real scary but it is nothing but a pile of junk without a magazine full of viable ammo.