Bought for a psak-47. needed some modification to fit - UTG Pro Quick Detach AK Side Mount

It was loose initially but did some slight modification to get it to fit. After that, it latched tight and stayed zeroed with a red dot. Here's what you do to make it fit. You get a pair of vice grips, a rag, and a Philips screwdriver. Tighten the screw all the way until you can't turn it anymore, but don't strip the screw. Make sure the lever is to the rear of the mount. Next place the rag between the vice grips and mount near the center where the screw is. Compress the mount little by little with the vice grips and tighten the screw as you go. Small increments until the rail is rough going on the rifle. Then back out the screw just a little and make sure it slides out without any resistance. Now put the mount on and move the lever to the front of the rifle. It should latch on tight enough now to stay put