I really like the FX No Limits rings' ability to increase a scope's adjustment range at long distances. However I found that trying to adjust zero using just the rings to be way fiddly. I found, when adjusting the vertical movement, it was too easy throw the zero way out of whack. So I built a gadget to help fine tune the rings easily. I can now get the initial zero with out using extra clicks on the scope. I'm not sure if I found a solution to a problem that doesn't exist, but I found that it really makes re-zeroing scopes at different differences much easier. Besides it was a fun pandemic project.
It's essentially the bottom half of a cheap scope ring with the ears cut off and a piece of 1/4" aluminum bar stock with a 1/4-20 hole tapped in it.
I used an old knob from some photo gear as the adjuster, but any 1/4-20 bolt will work.
Here's the adjuster off the gun.
I took the locking pin out of the ring mount so I could drill a hole through the mount. That hole is not tapped. Its just there to allow the adjusting knob some extra room. After tapping the 1/4' aluminum flat stock I epoxied the two pieces together using a plain 1/4-20 bolt and nut through the hole to both align and clamp the pieces together. I put a thin coat of silicone grease on the bolt to make sure it didn't get glued in place. Finished the project off with a couple of coats of flat black paint.
The whole thing was made with a Dremel with a cutting wheel, a belt sander and drill.
It's essentially the bottom half of a cheap scope ring with the ears cut off and a piece of 1/4" aluminum bar stock with a 1/4-20 hole tapped in it.
I used an old knob from some photo gear as the adjuster, but any 1/4-20 bolt will work.
Here's the adjuster off the gun.
I took the locking pin out of the ring mount so I could drill a hole through the mount. That hole is not tapped. Its just there to allow the adjusting knob some extra room. After tapping the 1/4' aluminum flat stock I epoxied the two pieces together using a plain 1/4-20 bolt and nut through the hole to both align and clamp the pieces together. I put a thin coat of silicone grease on the bolt to make sure it didn't get glued in place. Finished the project off with a couple of coats of flat black paint.
The whole thing was made with a Dremel with a cutting wheel, a belt sander and drill.
These definitely make it fast and more precise. 
