In the USA, this would be covered by your Constitutional ban regarding making any law in respect of religion.
In Canada, it would be covered by any number of old documents which nobody bothers to read, such as the Bill of Rights of 1689 and the Canadian Bill of Rights of 1960.
So the answer is a definite 'yes' to all three of your questions. I know Witnesses who hunt and who own guns, but I am in Canada. In Canada, you are supposed to dial 911 before you die: doing ANYTHING in self-defence is considered anti-social here, which is why we have so many strung-out dope-addicted violent hoodlums in a couple of our cities. Fortunately for the rest of us, they are thinning each other out these days, accounting annually for something like half of the murders in the whole country. The Government uses the statistics thus generated to prove that people who are NOT strung-out dope-addicted violent hoodlums should not be allowed access to firearms. It doesn't make sense but then, in Canada, it doesn't have to make sense: it need only be Government Policy.
As to what the Church itself might think, that well could be another matter. I am not a Witness myself and rarely attend any church, so I can't help you there.
Hope this is of some help.
Newell, WHY are you blocked? There ARE people here who aren't against you, ones who don't CARE about your personal life, that just like to shoot.