there is a variance in mag and magwell dimensions, from country of origin.

in the sar's i've owned, i've used chinese, romanian, east german, bulgarian, russian, egyptian, yugoslavian and hungarian magazines with equal success.

the only thing i've noticed is that bulgarian mags seem to fit more tightly than the others.

i really can't recommend one over the others, but for cost reasons i like the east german steel mags.

a little side-to-side play doesn't hurt a thing. figure out what fits your rifle to your liking and buy a half-dozen of that particular magazine.

someone was selling romanian steel mags for $8 at the last show i attended. you might try running those, as they are made for the romy rifles.