I am going to get so much sh*t for saying this and I actually hate the idea because they are so f*cking ugly (real operators operate with style) ... but, here we go ...
If you want cheap SHTF guns, get Hi-Points. You can still find them for $200 on Gun Broker.
Go to YouTube and watch the Demolition Ranch torture videos, the only way to destroy them is shooting them with other guns. The guy fills them with concrete, hammers bullets, puts metal bars through the barrels... and the Hi-Points work and don't blow up.
There, I said it.
Now you can all call me a fag.