carl makes mods added a new file:
QuoteLets you put folding stocks on AKs that normally wouldn't be able to take them. You can now put skeletal triangle stocks on the Saiga, AR-15 stocks on the AKS-74/AKS-74U, and all that good stuff or something.
Advanced Custom Weapons probably already does this, or at least, it should. Don't install if you're already using that or something.