I definitely recommend having it properly silver soldered on. It'll look and feel more the part if you do not to mention being far sturdier than JB weld. Plus, as many hack jobs as I have seen, I always try to perform any 'upgrade' as such the way it was done by the armourers who originally did them. If you want to do it yourself, get some tools together (having the equipment and know how will come in handy all the time I find) and practice a bit. Then I suggest you go for it, worst to worst, you un solder it and try again. Good luck!
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