In the 40s and early 50s the Bethel nightwatchman carried a revolver. After a guard shot up a giant roll of paper one night Knorr put an end to it.
In the 60s my Congregation Overseer was a cop. In the late 60s, we had two additional deputies and an FBI agent in the hall, and an undercover. One meeting about 1968 one of the deputies jacket popped open while he was giving a talk exposing a pearl-handled 45. All the kids were impressed.
During the late 70s Watchtower got very anti-gun and three of the elders quit the force in order to remain in "Good Standing"...and almost starved. Two remained cops...don't ask don't tell..and just didn't serve.
The JWs who do carry are rare...and do it secretly.
While publicly Watchtower is anti-gun and anti -cop...surprisingly they have no problem recruiting ex-cops to investigate (stalk) "enemies" (apostates-litigants) Watchtower deems dangerous to its financial interests.