United Methodist,Catholic,Lutheran, Prebyterian,Reform Jewish,UCC, UU,Episcopalian,Quaker, Christian Scientology, Congregational all these in the US are involved. Even though the Catholic Church recognizes self-defense they are still for gun control. At least the Bishops are ie the hiearchy.
You failed to mention Baptists, Orthodox, Christian Church (Disciples of Christ), Anglican, and the Society of Friends.