|I mounted one of these to my Yugo SKS. Initially, the setup would not hold zero because of the violent recoil of the gas piston assembly directly under the mount. A little nail polish on the threads, and problem solved!
This dot sight is excellent for the money. I have my SKS sighted for 50 yards, and I shoot at 25 and 100 yards with very little hold-over. Perfect for what I use the rifle for. I'd definitely recommend nail polish or loctite on all machine screws. The included rings have held zero perfectly, even after being heavily mistreated on several occasions.|