Deseret News reports Cyrus Wheelock's recollection that he gave Joseph a six shooter revolver; Joseph gave a single barrel pistol to Hyrum Smith.
“History of Joseph Smith,” Deseret News Weekly 7, no. 37 (November 18, 1857): 290b
After receiving these assurances, Wheelock prepared to visit the prison; the morning being a little rainy, favored his wearing an overcoat, in the side pocket of which he was enabled to carry a six shooter; and he passed the guard unmolested. During his visit in the prison he slipped the revolver into Joseph's pocket. Joseph examined it, and asked Wheelock if he had not better retain it for his own protection. This was a providential circumstance, as most other persons had been very rigidly searched. Joseph then handed the single barrel pistol, which had been given him by John S. Fullmer to his brother Hyrum and said, "You may have use for this." Brother Hyrum observed, "I hate to use such things, or to see them used." "So do I," said Joseph, "but we may have to, to defend ourselves;" upon this Hyrum took the pistol.