JB Weld is good stuff, I've used it on a number of items and unless the surface is contaminated with water, oil, or corrosion, it typically bonds very well. I once used it to build up a magazine catch in an old Thompson Auto-Ordnance 1911. The hole in receiver had been incorrectly machined and created a sloppy fit with catch and that positioned the magazine just a tiny bit too low in the receiver for reliable feeding. I JB Welded the bottom surface of the catch, which eliminated the slop and slightly lifted the magazine. The JB Weld held up for about 1000 rounds of full power ammo.

I also used JB Weld to attach a piece of metal to a Mauser 98 military trigger to eliminate the first stage of the pull. Also used it to attach a piece of metal to a Ruger MK II target pistol to act as a trigger over-travel stop. Added a bead of JB Weld to the bottom of my M1 Garand stock to tighten up a previous glass bedding job.

__________________
VCDL, GOA, NRA