unertl target mount removal

[plumber]

I need to remove my Remington 20X scope with Unertl target mounts, and install another scope on my rifle. I tried loosening the thumb screws. They unscrew a few turns, then stop. I don't want to force anything.

How do I remove Unertl target mounts without snapping the screws?

 

[Cheechako]

plumber

Often they will come off from just those couple of turns. But if not, look inside the knobs. You'll see a hex-head screw. That needs to be loosened. A good plumber should be able to figure it out from there.

Good Luck. What's the serial number on your scope? Mine is 286.

Ray

 

[BrianJ]

mount

Plumber,

I assume these are not Posa mounts.
What happens is that the inside face of the thumbscrew is conical shaped and when tightening them too tight or while slightly misaligned, is that the sharp edge of the "cone" flairs out with a burr. As you try to unscrew, this flaired burr hits the edge of the mount not allowing it to unscrew far enough.
Loosening the center screw will not help you if this is the case.
Unfortunately about the only solution is force. Then completely unscrew and remove the screw and file (turn) the lip down (back to shape).

By the same token, from misalignment the dovetail block can get a burr from the screw and even though the screw may be backed off enough the burr on the dovetail will not allow the mount (s) to slide, again force and clean-up required.

bjm

 

[plumber]

I got it!

No force, the little I could loosen the thumb screws was just enough.

My Remington 20x scope's serial number is 056, and the scope is a very nice piece.

I'm going to try a Weaver T-36, see if the scope magnifies my errors in hold enough so I can tighen groups at 50 yds with my 40X / 22LR