Add a little coating of lite glue or Spray Adhesive to the ring tape or bare ring. Just dont use a glue thats super strong so you can remove it if needed later in life. I used the Spray Adhesive. I had aroung for automotive headliner use .. i just sprayed some on the tip of my finger and dabbed a little in each , My scope was not sliding but rotating clockwise. Lol..
Try flipping the clamp over. there 2 way you may have in place the 3/4 gruve "jaw" not the 11mm jaw. It is reversible... notice on side of the clamps pips are longer the the other(top pic)Incorrect for 11mm 2ed Correct for 11mm 3d
You should use the scope stop. You can move the scope stop to the front set of screw holes and slide the front scope ring back against it. If you use the back screw holes you'll need an off-set mount to get your eye close enough to the scope to get a good clear picture. You'll notice the rear scope ring on the Edge in the picture above with the Moon camo. It is off-set. Very cool looking camo and scope mounts, by the way, on that gun. I could never find the moon camo when I had the money to get one. I liked that moon camo cheap gun or not.