Tranquilizer gun

A tranquilizer gun (or tranq gun) is a firearm whose ammunition is non-lethal, and used to knock enemies unconscious. Tranq guns in the MGS solid series include:
 * Mk22 - used by Naked Snake in Operation Snake Eater (MGS3)
 * EZ Gun - also used by Naked Snake in MGS3
 * Mk II pistol - used by Solid Snake in Guns of the Patriots (MGS4)