I got Yugo underforld. My stock when is locked in extended position has play 1/2 inch up and down.
Any fixes for this issue?
Thanks

No easy fixes that I know of.

A good welder could add material to the receiver to tighten the holes. A good machinist could fab a bigger locking block.

Barring those kind of fixes you'll have to live with it.

BSW

Have you tried tightening the hinge nut on the right side of the locking mechanism?

You'll need to press in the button and hold it while you drive out the roll pin that hold the threaded nut from spinning, then rotate it clockwise to tighten it until you reach the closest hole to where you like, then reinsert the pin and you're GTG>

hi,

that's what i did with my century yugo that had the same problem.  here is the link on how to do it...  http://home.earthlink.net/~mwsjb/AKbuild3.htm

Unfortunately its the nature of the beast.  Tightening the nut might help a little, but it wears eventually and the slop comes back.  The only way to make a "perfect" underfolder is to drill the trunnion and latch holes yourself from the factory with a CNC.  Anything else is always going to yield a little slop, just like the originals.  Sometimes you get lucky and get one better than others.  

On my Polish underfolder I used some spare parts from an M70AB2 and just played mix and match until the stock seemed nice and solid.