Hello,
I recently tried a Top Cover tri-rail mount I ordered from CDNN. I put it on my Romy Ak-47 and it worked great. Accuracy was good enough for what you can expect from a red dot at 100y. I assumed since it worked on the Romy it would work on my Tantal but it didn't. The button to release the top cover plate was just a hair too big for the after market rail plate. I didn't notice it was not clearing the hole completely. As a result i had lots of stove pipes at the range. I plan on grinding the hole bigger and testing it again. The other mount that was suggested in this thread is nice but if you fire corrosive ammo it will require removing the stock screw every time. Then again, im open for suggestions myself. I'm not too happy with the one i have at the moment.