I think that the rifle is working now. After installing the new scope stop behind the back rings the scope has not moved anymore. I maked the receiver with a awl and can see if the back ring has moved from it's original position and it's not moving any at all.

I got a Wheeler Engineering Fat Wrench which is a small hand held torque wrench that works really good. I had to buy a insert screw to fit the head on my ring's screws but other than that it was easy to use and work with. The Fat Wrench that is. I also have a Wheeler Engineering Profession Scope Installation kit now in case I have to mount any more rifle scopes. I can now lap the rings to fit a 1" scope and have the tools to measure the fit when done. This ensures that the rings and scope body match up perfectly together. I found that it's critical to do that for long range shooting accuracy.

I've invested in a new AR15 with a new Nikon Scope and an EOTech Hollow Graphic Weapons Site system.

I still have the Gamo Bone Collector Air Rifle and have used it to dispatch the Fox Squirrels from my Bird Feeders. The last Fox Squirrel that got into my Sunflower Seed Feeder tray got blasted off the platform from 10 ft away and I hit him right between the eyes. So the Gamo Rifle and Scope is deadly accurate now and doing the job that I bought it for. I either live trap these Fox Squirrels if possible and transport them to another area far away or shoot them if I can't trap them live. Either way they are removed and not eating me out of house and home. That bird seed is not cheap and one Fox Squirrel can eat as much bird seed in one sitting as ten Blue jays.

There are still plenty of Fox Squirrels around as I see them running around in my neighbor's yards so they will eventually figure out where my bird feeders are and I'll have to trap them or shoot them. They seem to replace themselves with new young squirrels every year so I don't think that I'll run out of targets any time soon.

They mate is Jan and have their young in the spring of the year and produce 4 to 6 little squirrels each year. But the next winter the little one's are ready to breed. They get in one of my trees and since it's got a lot of leaves growing all over the tree it's very hard to see them when they get up in that tree. So I really can't shoot them out of the tree and have to wait until they get in another tree that's more open.

I'm just happy that I got the Gamo working right as I paid a little over $200 for that air rifle just to be able to shoot the squirrels. I have two other Crosman 1077 Repeating Air Rifles that I loved until the seals went bad and they would not hold the CO2 in the Cartridges. Which made them useless to me. I'd have them fixed but it cost more to fix them than to buy a new one. And I don't need a new one that will go bad in a few months time. Then I'd be stuck with three useless air guns. The only reason I purchased the second one is because I purchased a adaptor for the first one to let me use the larger CO2 containers. But then later I learned that the adaptor for only used for a more modern version of my Crosman 1077 Rifle. The one I had was not able to work with the new adaptor so I figured I'd just buy a new 1077 to work with the new adaptor kit. That new rifle only worked for a short time before it's seals started leaking so bad that it would not hold any air in the system. So don't buy the Crosman 1077 Air Rifle as it' junk. Too bad they can't redesign the seals to make the system work. As if the seals hold the air the rifle is pretty cool. I think that the rotary clip holds either 12 bb's or 12 .177 lead pellets and it's a semi auto. So when it was new and working right I could fire 12 shots before reloading. I took my old 1077 to the gun smith that's a certified Crosman repair dealer and they told me it cost too much to fix them and that it's not worth fixing. So that's not something that I said that's what the guy at RAJO's gun shop said. And he is the local Crosman's Authorized Repair shop in this area.