Ammu-Nation is the only Gun store in all the GTA III Era. It sells weapons from Pistols to Rifles and Snipers. Ammu-Nation does sell a few items apart from guns such as Armour and Grenades. When you start a game of grand Theft Auto, Ammu-Nation has very little guns in stock. he only guns are little pistols and sometimes grenades. As you progress through the game Ammu-Nation has more weapons avalible to buy. Ammu-Nation only sells Heavy weaponry is Grand theft Auto: Vice City Stories.