Revolver
A revolver was a type of handgun that used a chemical reaction to propel a lead bullet. 

In the western Kung Fu, played for movie night at the catwalk in September 2152, the actor seen on the monitor used a revolver. ()

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  consisting of Starfleet and MACO personnel. ()

Sulu and Kirk both fired a .38 police special, a type of revolver, on the Shore Leave Planet. ()

While reenacting the "Battle at the OK Corral", Kirk and his crew used Colt .45 revolvers. ()

Fred Noonan used a revolver to hold an away team from the  hostage, after he and seven other Humans were awakened from a four-hundred-year stasis. ()

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Hand-held weapons
Projectile weapons