Re-doing barrels on GH.

[Phil C]

Years ago one of the guys at work had a Charles Daly If I recall correctly with a loose rib. We cleaned well with MEK and used 3M 2216 epoxy. Clamped it down and cleaned off the excess. He shot the heck out of that gun on dove and it never loosened.
2216 is incredible but it is very expensive. The upside is great shear strength, withstands vibration and holds up and stays flexible and adheres over extreme temperature ranges.
Developed for the aerospace industry. We used it to hold Boundary Layer Energizers to the top of Learjet wings. When properly prepped before installation the BLE’s would hold on for thousands of hours of use in wide variety of operating conditions.
I Googled and found a 1 OZ tube on Amazon for under $20.
Just another idea to research for a possible solution.