CW says he gave JS a six-shooter, JS gave HS a single barrel pistol, which he got from JF.
Cyrus Wheelock as cited in "The History of Joseph Smith," Latter-Day Saints Millennial Star 24, No. 29 (July 19, 1862): 459
The morning being a little rainy, favoured 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.