It's not about the gun. The gays need silver bullets. Fabulous silver bullets. They need to be consecrated or blessed by a theater kid who officiates non-binary weddings. (The ambiguous gender norms of the non-binary confuse gays and cause extra damage.)
An oak or ash stake with a silver nail driven into it will also work but requires being very close to a gay, which might infect you and cause you to be gay. Then you'd have to turn the gun on yourself. It's not worth the risk.