Attached FileI put about 200rds through my M90 this morning actually. There are pros and cons to the rifle.
Pro's:
It's accurate for an AK. It uses ammo thats not almost exclusively made in Russia. The mags are a little expensive at $40 but they're built like a fucking tanks. You also can convert Galil mags. It has an awesome adjustable gas system. Zastava stands behind their products, from the factory my original gas tube was kinda messed up, and they sent a new one no questions asked. The barrels are chrome lined. The receiver is 1.5mm, the trunion is beefier than standard AK's, and the 18" 1x7 barrel all make for a gun that's heavy enough to absorb recoil well, especially combined with that adjustable gas setting.
Con's: As I said above ^ factory mags are $40 and it's a heavy gun. Also the non standard side scope rail makes adding an optic mount more difficult because every company that makes Yugo specific mounts seem to always be out of stock. Also the furniture is Yugo pattern only, but aftermarket pieces are more available than in the past. Zastava recommends you keep the factory trigger and NOT replace it with an ALG or other because it can cause premature wear on the carrier....but I think the factory trigger is fine. The original slant break it comes with sucks, but it's a standard 14x1LH pitch so muzzle attachments are easy to find.
But for my money (literally) I think it's one of the absolute best values you're going to find in AK's right now. I love mine.
Oh one other con to list......once you have mags for the 90 and see how well made it is and fall in love with shooting it, you're gonna want a ZPAP85 too.