I started to install the scope on my new Crown MK2 and found that there was almost no clearance between the scope objective bell and the barrel about 10 thou. When I went to install the magazine I found the scope was to low. I had to raise the scope rings 55 thou to allow the mag to clear with a little extra clearance and when I went to tighten the screw I had to really tighten the screw with some force to pinch the ring tight enough to hold the ring in place. I used a short Allen Wrench and slowly tightened the screw trying not to over stress the screw. Well just when I was able to stop the movement in the ring the screw striped out the threads.
Upon inspection I found that the screws only engage the threads about halfway need to have a longer screw. I wanted to shoot the gun so I drilled out the threads and installed Metric Helicoils in both rings and reinstalled the rings. So be careful and go slow. I'm an old man and didn't know I had that kind of strength.
Upon inspection I found that the screws only engage the threads about halfway need to have a longer screw. I wanted to shoot the gun so I drilled out the threads and installed Metric Helicoils in both rings and reinstalled the rings. So be careful and go slow. I'm an old man and didn't know I had that kind of strength.