General term for handheld firearms such as rifles and pistols; does not typically refer to cannons or artillery.
He raised his gun.
Possession of firearms is strictly regulated in this country.
He fired his gun in the forest.
The robber pointed a gun at the store clerk.
The criminal held the hostage at gunpoint.
The man shot the police officer with a gun.
He was carrying a gun without a permit.
銃 is a broad term covering any firearm (rifles, shotguns, pistols), whereas ピストル specifically means a one-handed handgun.
銃 is the simple, everyday word for a gun, while 銃器 is a more formal, collective term used in legal or news contexts.
small arms; firearms
muzzle; gunpoint
rifle; small arms
machine gun
bayonet · guns and swords
gun barrel
gunshot sound; report of a gun
hunting gun; sports gun
gunfire
matchlock gun; arquebus
gun emplacement; gun mount
guns; firearms
gunshot wound
gunstock; stock of a gun
home front
pistol; handgun
stacked arms
funeral rifle volley; volley of rifles at a funeral
mounting a gun; gun mount
discarding a tile that completes another player's hand
bullet
gunshot wound
execution by shooting; death by firing squad
musketeer
breech (of a gun)
gun grip; grip of a gun