put a set of sights on a 12 ga. with jb weld it worked good untill one HOT DAY.....i went to unload some not so perfect reloads shooting them as fast as i could then all of a sudden i had no ft. sight.......two shots later the rear fell off,,,,,,,,,,as long as you dont get the barrel red hot the jb works......but i think epoxy would work better.....jb