It's neither Christian or non- Christian to own guns. Both kinds of people hunt. Some to feed their families, some for sport, some for both. Its just a way of life for some people.
If you're talking about guns people own solely for "protection", that's more of a gray area. One could argue a lot of verses from the bible to turn the other cheek and to take no thought for the future, making it seem unchristian to be making plans for self- defense. But in true Christian fashion, they get around this by telling us what god really thinks: that he gave us a brain for a reason and it would be sinful to not protect our family or all the "blessings" that good has given.