A revolver was a hand-held projectile firearm using a chemical reaction to propel a lead bullet. Revolvers are characterized as handguns and derive their name from a rotating cylinder that moves the next loaded chamber into firing position when the hammer is moved back to the cocked position.
Revolvers were in common usage on a Skagaran colony planet in the Delphic Expanse. Charles Tucker III, while visiting that planet in 2153, swapped his revolver along with his harmonica in return for a horse from a stablehand. Deputy Bennings subsequently placed his own revolver on a table in a saloon, elsewhere in the same town, and dared a Skagaran named Draysik to pick it up and use it to shoot Bennings. This incident prompted Jonathan Archer, who was sitting nearby, to subtly reach toward his own revolver. However, the situation was resolved without violence by the arrival of Sheriff MacReady. Bennings later used his own revolver to shoot Human school teacher Bethany, though, and revolvers were also used in a battle between multiple cowboys and an away team from Enterprise NX-01 consisting of Starfleet and MACO personnel. (ENT: "North Star")