Tom and Jerryy, l think that the tension method would be best as Tom describe but, without the steel receiver I don't see that will work.My Donny FL a70 adapter slides over the bbl and doesn't have a step to apply force against the bbl, same with my monocore. I used the original baffel that came with the avenger. It has a 1/2" space between it and the bbl. I made a spacer of brass tube to fill the gap and added a plastic washer to each end, tighten down as tight as I could by hand. Did a 5 shot groug.at 23 yards group was 5/8". Removed spacer and washers and shot another 5 shot group of 5/16", same pellets and distance. Please give me any thoughts.
Quote from: Tim F on August 11, 2022, 10:16:44 PMTom and Jerryy, l think that the tension method would be best as Tom describe but, without the steel receiver I don't see that will work.My Donny FL a70 adapter slides over the bbl and doesn't have a step to apply force against the bbl, same with my monocore. I used the original baffel that came with the avenger. It has a 1/2" space between it and the bbl. I made a spacer of brass tube to fill the gap and added a plastic washer to each end, tighten down as tight as I could by hand. Did a 5 shot groug.at 23 yards group was 5/8". Removed spacer and washers and shot another 5 shot group of 5/16", same pellets and distance. Please give me any thoughts.
Jerryy, thanks for the information. I agree that pressure is the right approach on the avenger. Currently the original bbl bushing the screws into bore end of the shroud has a 1/2" space between it and the bbl. The brass spacer and 2 rubber washers were aligned with a wooden dowel and held in place only by pressure of the original bbl bushing. MY concern is if any tension is released these parts will shift and create an issue. The Donny FL slides over the bbl and is smooth on the inside, I can't see away for it to put pressure on the bbl. Same issue with the monocore. If there was some band too attach to the bbl so as the Donny FL could put pressure on it, that might accomplish the goal. It seems like FX did something similar to the bbl clamp on their tensioning system. I have ordered the fiber carbon sleeve that will slide over the bbl. I hope to cut it to the proper length so that the Donny FL adapter or the monocore will put pressure on the carbon fiber sleeve by screwing the adapter down as you described. My hope is it will put pressure on the shroud and stabilize the bbl.Thanks Tim