I'll assume for a second that this is not the usual trolling (which around here is usually a bad assumption).
If you're a Christian fundamentalist and you take scripture to be literally interpreted, then owning a weapon is allowed (see Luke 22:36), but using that weapon against another (even in defense of self or others) is not (see the Sermon on the Mount). However, the threat of having the weapon as a deterrent is OK. In other words, having a gun in a holster on your hip would be a fine way to deter a criminal from messing with you, but if someone did attack you, you should not use it (or any weapon) to resist.
Most Christians don't believe that all scripture is meant to be accepted literally without context and interpretation. In my opinion, if you did, you'd run into a lot of contradictions. In fact, the Old Testament includes laws on killing in self defense, which would contradict the Sermon on the Mount. Instead, scripture should be interpreted in the context of the time during which it was written, which of course leaves it wide open for people to abuse it / manipulate it to mean anything they want it to mean and use it to justify anything.
My personal take is that the Sermon on the Mount "eye for an eye" etc should be taken in the context of not seeking revenge and instead forgiving those who do something wrong to you. Stopping someone from hurting someone is OK, but hurting them back as a form of vengeance is not.
The other issue with regard to the OP is that you assume that not wanting to own a gun is the same as supporting gun control. Perhaps because of my religious values I might think that using a gun is not allowed, but that doesn't mean I need to support misguided attempts by the government to take the guns away from law abiding citizens.