careful It would depend on the reason for the handgun possession. Is the Witness in law enforcement?
I have been out for 30 years, but I recall carrying a gun for employment was HIGHLY frowned upon by the WT. I remember being told I was not "above reproach" because of being in law enforcement. Has that viewpoint changed in subsequent years? Of course JW's have no issue with calling police (who may have to use deadly force) and have them act as surrogates in violent situations.