Ancient Pre Astro Firearm. Chemically propells a projectile. Especially Terrans have advanced the Firearm technology and some are still produced and used.
The .38 Smith & Wesson Special (commonly .38 Special, .38 Spl, or .38 Spc, pronounced "thirty-eight special") is a rimmed,centerfire cartridge designed by Smith & Wesson. It is most commonly used in revolvers, although some semi-automatic pistolsand carbines also use this round. The .38 Special was the standard service cartridge of most police departments in the United States from the 1920s to the early 1990s, and was also a common sidearm cartridge used by soldiers in World War I. In other parts of the world, particularly Europe, it is known by its metric designation 9×29mmR.
(A 38 special revolver was carried by AXOM special agent Kate Johnson . Reference GC Book 3: Xeno Activity)