http://www.downrange.tv/forum/index.php?topic=15493.0;topicseenAccording to testimony at the Spicer hearing Wyatt used a pistol and Doc used a sawed off shotgun.
This is what Wiki says about the guns though.
How the fighters may have been armed
No revolver was found on Tom after the fight, by any witness. As noted, Tom's usual revolver remained unclaimed during the fight at the bar at the Capitol Saloon, on 4th Street and Fremont less than a block east of the gunfight. This revolver was exhibited and identified by the barkeep and by Ike Clanton as being Tom's revolver, at the Spicer Hearing. Wyatt Earp, to the end of his life, would believe that the revolver Tom had used in the gunfight had been removed from the scene by a Cowboy confederate. At least two witnesses thought Tom had obtained a revolver in a butcher shop on Allen street just before the fight, for he was seen leaving the shop with a newly-bulging pants pocket. However, he would have had to walk past the very saloon where his own revolver had just been deposited and was stored, to have carried this second revolver to the fight. The bulge in Tom's pants pocket noted by witnesses before the fight may have been the nearly $3000 in cash and receipts found on his body (he had probably actually picked up these at the butcher's shop immediately before the fight, as it makes little sense that he'd spent all night carrying around this much cash).
Even if Tom wasn't armed with a revolver the question remains about whether or not he tried to get a rifle. Virgil Earp testified Tom attempted to grab a rifle from a horse (this would have been Frank or Billy's horse) before he was killed. Wyatt thought Tom fired a revolver over "his" horse (actually it would have had to be Billy's horse, because Frank had his own and Tom had none). It's very possible Virgil was mistaken about which McLaury brother used his horse in the fight, as Wes Fuller saw Frank in the middle of the street shooting with a revolver, and attempting to get a Winchester from his own horse, and failing (the very action attributed to Tom).
Billy's revolver was taken from him empty by C.S. Fly, who emerged from his boarding house at the end of the fight to disarm Billy.
Frank's revolver, with two unfired rounds remaining in it, was recovered on the street a few feet away from Frank by a bystander, and placed next to Frank's body as it lay on the sidewalk. Frank's revolver was then taken by the coroner, Dr. H.M. Mathews, and laid on the floor of the Harwood house while he examined Billy and Tom (this would cause some confusion later, but both Billy and Frank's weapons would later be positively identified as their own, by witnesses).
Both Frank and Billy were armed with Colt Single Action Army revolvers (identified by their serial numbers at the hearing later) and presumably their Winchester rifles were Model 1873 weapons to match this .44-40 cartridge. What weapons the other participants of the fight were carrying cannot be ascertained from primary documentation, and remains an open question.The two saddled horses of Billy and Frank escaped from the fight unwounded and were later caught a few hundred feet up the street, both with Winchester rifles still in place in their scabbards.