The Underground Gun Shops serves as the replacement of the Ammu-Nation featured in past games. Their absence is explained in a radio that the stores disappeared due to a crackdown on guns in the city by mayor Julio Ochoa (just like the current New York City) as an attempt to prevent crimes. This led to an opportunity for selling firearms illegally on the black market in Liberty City without a permit.
The gun shops are located underground in certain alleyways and are found in each of the main sections of Liberty City. Upon entering the premises, weapons are found placed on tables around the shop, and a small shooting range is found at the entrance.
Much like in Ammu-Nation stores from the 3D Universe games, if the player attempts to target or shoot at the store clerk, they will attack them and they might receive a wanted level for firearm discharge. Some pedestrians can be found at the entrance to the shop loitering casually, but they are actually guards who will defend the shop.
Killing the owner of one of the shops results in the aforementioned guards armed with Combat Shotguns and SMGs attacking the player. It also prevents the player from buying weapons from that shop again for a period of time, as the new clerk will begin shooting at the player with a Combat Pistol should they enter the shop again. Players cannot enter the shops if they have a wanted level; upon arriving at the door, it will be locked, and a message will come up, telling the player to lose their wanted level before they can enter.
There are gun stores all over Liberty City. There is one underground store located in each of the three main parts of the city. In Grand Theft Auto IV, they are accessible after the mission "Do You Have Protection?".
|The first shop is located on the corner of Dillon St. and Montauk Ave. in Downtown Broker, and first appeared in the mission "Do You Have Protection?", in which Dimitri directed Niko to purchase a Micro-SMG from the shop. The entrance is down an alleyway.|
|The second shop is located in Chinatown, Algonquin. It is on Bismarck Ave., across the road from Cavity Lane. The entrance is down a small set of stairs, and the guard is usually found to the right of them. The manager here is a stereotypical Chinese retailer, most likely a triad member.|
|The third shop is located in Port Tudor, Alderney. The manager of the store is a member of The Lost MC, as his logos and tattoos resemble those of the Lost and the surrounding territory is run by the Lost. This one is found at the corner of Odhner Ave. and Traeger Road, just west of the Plumbers Skyway. It is on the same block as a Pay 'n' Spray, and across the road from the phone used to receive the Fixer's assassinations. The entrance is up some stairs in an alleyway that passes by, which leads to a small yard behind the shop.|
To purchase weapons, the player has to walk up to the table and view them. When doing this, the protagonist picks up the weapon and examines it, reloading and viewing them.
The following is a list of weapons purchasable from the underground gun shops and their prices (buying ammo for a weapon is cheaper than when buying the weapon, unlike previous GTA games).
In Grand Theft Auto IV, some weapons are unlocked inmediately after the player unlocks the first shop, but as the player progresses, more weapons will become available. The Knife is not available to buy in any of the shops.
|Weapon||Cost of Weapon||Cost of Ammo||Unlocked in (GTA IV only)|
|Baseball Bat||$5||-||Do You Have Protection?|
|Molotov Cocktail||$500||-||The Master and the Molotov|
|Body Armor||$500||-||Do You Have Protection?|
|Grenades||$1,000||-||Deconstruction for Beginners|
|Pistol||$600||$35||Do You Have Protection?|
|Combat Pistol||$1,500||$100||Museum Piece|
|Pump Shotgun||$1,200||$100||Do You Have Protection?|
|Combat Shotgun||$2,500||$200||Blow Your Cover|
|Micro SMG||$1,200||$100||Do You Have Protection?|
|SMG||$2,500||$150||Luck of the Irish|
|Assault Rifle||$3,500||$80||Deconstruction for Beginners|
|Carbine Rifle||$5,000||$100||Three Leaf Clover|
|Sniper Rifle||$6,000||$800||Luck of the Irish|
|Combat Sniper||$8,500||$500||Luck of the Irish|
- Sometimes, when buying a weapon, the manager congratulates the player on their choice, or promotes the weapon.
- Occasionally, if the player kills the store owner with a headshot, one can hear over the police scanner mention of an attack on an officer, even if no police are present outside the gun shop.
- If the manager is hurt or killed, but no guards come to his aid, they might be waiting right at the door and will fire at the player upon their next visit.
- There is a W.O.M.D poster with some weapons depicted on it. Unlike those available in the game, they seem to be real-life weapons.
- If the player loses the wanted level near the store and enters it, the weapons will be absent.
- The targets on the wall are fully destructible.