all our teachings are universal… we worship in Unity in over 236 countries and territories.
However the info Yerusalyim provided you with was not correct
for example the Watchtower Magazine English version of July 15th 1983 is talking about this subject
If someone has employment that involves carrying a weapon for use against other humans, or if he is required to be trained in the martial arts, such as judo and karate, what should he do? In making his personal decision he must bear in mind that a follower of Jesus is to pursue peace. (Romans 12:17, 18) In view of what is stated at Isaiah 2:4, most of Jehovah’s Witnesses avoid such employment. Even though the employment may be for the purpose of protecting the public (or property) in harmony with Romans 13:4, experience has shown that there is always the danger of incurring bloodguilt by taking life with the weapon, with harm to the individual’s conscience, as well as there being a danger of injury or death to oneself due to retaliation. (Psalm 51:14; compare Numbers 35:11, 12, 22-25.) Certainly it is best to avoid such dangers by selecting employment where they do not arise.
During these “last days,” many employees are expected to carry a firearm. Bank or security guards, watchmen and policemen may even be required to do so to hold employment. But what of the Christian, who is obligated to “provide for those who are his own”? (1*Timothy 5:8) His Bible-trained viewpoint would be different from that of worldly persons, who feel free to carry such weapons and to use them as they see fit in any dangerous situation that may arise. (Ephesians 5:15-17) He will want to avoid bloodguilt, having in mind Jehovah’s viewpoint on the sanctity of blood. (Genesis 9:6; Psalm 55:23) A mature Christian should try to find unarmed employment. Some Witnesses by talking with their employer have been successful in changing to a job that does not require carrying a weapon.
** As the world becomes increasingly violent we can no longer regard as exemplary a brother who continues in armed employment. He could be allowed six months to make a change. If he does not make a change, he would not be in a position to hold special privileges of service and responsibility in the congregation.—1*Timothy 3:2; Titus 1:5, 6**.