Tomochan, The leopould knockoffs are total garbage. Utter junk!! One of my buddies bought 3 off ebay, and gave me his ruger 10/22 and a pair of rings and asked me to set I up for him. They were mark 4 knockoffs,4-16x50. So I take this scope out to my range, and it looked pretty good. Nice thin crosshairs, ok clarity, so I get it minutes and try shooting. After 70 rounds I didn't have it zeroed yet. The screws holding the turrets I'n place stripped out, and as I was shooting the reticle started to tilt over sideways, every time I fired. Total crap.