I don't care for the underfolders. They get loose and wobble, and the AK needs all the help it can get in maintaining a good sight picture with those mediocre or worse open sights.
The East German/ Romanian sidefolding stock is okay, but is a bit narrow in the buttplate- you'll sometimes see these with a commercial recoil; pad taped on both to widen the surface area against the arm and to lengthen the short folding stock a bit for larger folks. I'm happier with the sidefolder on a 5,45mm AKM or AK74 clone than on a 7,62x39mm caliber gun, one reason I'm so interested in trying out some of the Russian 7,62 bullpups or a couple of my own ideas along those lines.
I've not worked real extensively with the triangular folder of the Russian paratroop AK74S version, nor the folding plastic stock of the AK103, but I'm willing to see what they're like. There's nothing really wrong with the short little AK fixed stock unless it's T-shirt weather, and if a field jacket with liner or a bulky parka is worn, the AK stock fits me just right. You figure that's what old MikTim had in mind all aloong?
If a foot or so's length needs to be knocked off the overall length of an AK, it's much better to do it with a folding stock than with any thoughts of a shorter barrel, though. And I'm really fond of the longer barrels anyway.
