"Do Mormans believe in the right to bear arms? I sure hope they do."
On a cultural level, most do and plenty own guns.
On a doctrinal level, also very much so. The following is believed to be the word of the Lord. Let's not debate if it is, just showing that it is believed to be by the Latter-day Saints.
Reference"47 And again, the Lord has said that: Ye shall defend your families even unto bloodshed. Therefore for this cause were the Nephites contending with the Lamanites, to defend themselves, and their families, and their lands, their country, and their rights, and their religion. "