Do not confuse the right to own a gun with having one. Unless you like to hunt (very hard for a Yid- we need to bring a goy to eat the treff animal since it otherwise it would be Tsar Baal Hayyim) or shoot targets, it isn’t worth owning a gun unless you have enemies you need to defend against.
In America, there aren’t many people we would want to shoot.
In Israel, the zionists have a lot of people they like to shoot. It isn’t that hareidim don’t have people they’ld love to shoot, but their rabbanim tell them no to.