Thread: Rebore.

Glued liners can work with low pressure calibers - 22LR being the most common. Often it's simply not feasible with higher pressure rounds and the available material (wall thickness) left in the parent barrel. I know of several people that did this with stuffed LE barrels converting them to 22LR trainers. Effectively it's just an extended 8mm drill bit with a pilot ground into the nose of the drill in a lathe so the drill doesn't bit one side and wander off, and then a chamber insert to be made up. Glue the insert to the liner, then glue the assembly into the barrel.

Hardest part now is getting a suitable liner, I got two off MAB when they were still in business in Aussie - no idea where you'd get one now!

As far as the buttons, it's easier to pull them as they self-align to a certain extent. Pushing can give you issues with the button tipping and all sorts of other gremlins popping in for a visit. The main risk with pulling is the forces being high enough to shear the button off the pulling system.