YOu will not be allowed to use your own firearm as your duty weapon. Stateside, you can own firearms, but they must be properly licensed and registered with the base as well. Overseas is another issue. Generally, you are not allowed to transport personal weapons internationally, so you will not be allowed to bring handguns or hunting rifles with you when you leave the US..both for duty stations and deployments. Japan has very strict laws on gun ownership and possession and the military has a strong record of supporting local jurisdiction when military break laws off base, so I wouldn't even suggest trying it. Addtionally, the military will follow any local laws concerning gun ownsership, licensing, if certain types of weapons or ammo are not legal in an area and trigger locks, so be sure to find out the laws concerning ownership whenever you move to a new base. One other thing...in Japan they have extremely realistic pellet and airsoft weapons available. While we were there, possesing these toys was not allowed...you couldn't have them on base and because of the laws in the US that require toy/sport pellet guns to be marked in such a way as to be easily differentiated as a toy, you can not bring them back into the states when you come back.