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As in previous Metal Gear games, all equipment is procure-on-sight, meaning that you must find your weapons in the field, but ammo acquisition has changed in this installment. You no longer have to find certain types of bullets for one weapon, for example, 5.56mm rounds will work for any weapon that fires 5.56mm rounds. You can also buy weapons and ammo from Drebin's Shop, but you can find almost every weapon Drebin has for sale in the field, so save your Points for Custom Parts and Ammunition. Also, if you kill or knock out a PMC Soldier and pick up his weapon and it is ID Locked, you will not be able to use it until you launder it to Drebin, so keep that in mind!

Customizing[edit]

An interesting feature in MGS4 is the ability to Customize your weapons however you like. But, be sure the parts you want to buy are the parts you are actually going to use. For example, you don't need to buy a Silencer for your weapon if you are planning on using it to kill the enemy when they have spotted you, you don't need to buy a Laser Sight for your weapon if the weapon is a Sniper Rifle. Certain attachments onto your weapons are not necessary, such as the Flashlight (you have the Solid Eye, which has night vision). The point is, spend your Drebin Points wisely.

Acquisition[edit]

You can acquire many weapons and custom parts in the field, even those sold by Drebin. Here's a list of where to find these weapons.

Middle East[edit]

Note: The weapons listed here are those found without ID Locks found in the Middle Eastern chapter.

Weapon Category Location
Stun Knife Melee Equipped at beginning of Middle Eastern Chapter
AK-102 Assault Rifle Found near pile of crates at beginning of Middle Eastern Chapter
Petrol Bomb Incendiary/Thrown Sometimes dropped by Militiamen during body shakedown
Operator Handgun Given to Snake by MK. II
Mk. I Tranq. Gun Given to Snake by MK. II
M4 Assault Rifle Given to Snake by Drebin
RPG-7 Rocket Launcher Found near entrance to Militia Safehouse
HK21E Machine Gun Near the Militia Safehouse exit, two Militiamen will be talking about gun laundering, one of them is holding this weapon. Use the Solid Eye to identify him, and use your Tranq. Gun to knock him out when they walk away to obtain the weapon.
Sleep Gas Mine Mine Advent Palace, either crawl over the mine to obtain it or use the MK.II to disarm and obtain it
Sleep Gas Satchel Remote Mine Advent Palace, behind the bar
Claymore Mine Advent Palace, either crawl over the mine to obtain it or use the MK.II to disarm and obtain it

Note: The following weapons are those found with ID Locks in the Middle Eastern chapter, and is not a complete list as of yet.

Weapon Category Location
Mk. 17 Assault Rifle Carried by almost all PMC Soldiers
M14EBR Sniper Rifle Inside a building housing multiple PMC Snipers in Urban Ruins area
P90 Sub-Machine Gun Carried by FROG Soldiers during their attack on the Advent Palace
Javelin Anti-Tank Missile Launcher Found on a rooftop after you exit the Advent Palace parking garage and get onto the street where the Militia tank is fighting the PMC Soldiers
Frag Grenade Explosive/Thrown Sometimes dropped by PMC Soldiers during body shakedown
White Phosphorus Grenade Incendiary/Thrown Inside a room with two dead PMC Soldiers in Militia Safehouse
Stun Grenade Non-Lethal/Thrown Sometimes dropped by PMC Soldiers during body shakedowns
Smoke Grenade Non-Lethal/Thrown Sometimes dropped by PMC Soldiers during body shakedowns
GSR Handgun Inside a room with two dead PMC Soldiers in Militia Safehouse

Custom Parts[edit]

Note: This is a list of custom parts found in the Middle Eastern Chapter, and it is not a complete list as of yet.

Part Location
Red Dot Sight Beginning of Urban Ruins area, at the top of a staircase near some boxes
M4 Silencer Locker in the building near Liquid's camp
Handgun Flashlight Urban Ruins area, behind a collapsed staircase
Laser Sight Inside Locker, top floor of the building where you first encounter snipers
GP30 (Grenade Attachment) Advent Palace during FROG Battle. After Akiba disables the lasers, roll over the gap and go to the end to find it along with some grenade ammo.

South America[edit]

Note: This is a list of weapons found in South America without ID Locks, and is not a complete list as of yet.

Weapon Category Location
G3A3 Assault Rifle Carried by almost all Rebel Guerrilla Fighters
SVD Sniper Rifle Found in a barn at beginning of South America Chapter
Twin Barrel Shotgun If you take out the two PMC Soldiers standing watch over the Rebels at the beginning of the South America Chapter, they will get up and unlock the door of a building they are using as an armory, and you will find it on the floor
G186 Handgun Carried by a small number of Rebels in Vista Mansion area
PKM Machine Gun Carried by Rebels in Power Station and Vista Mansion areas
C4 Remote Explosive Found in Power Station are
M10 Sub-Machine Gun Carried by a single Rebel in beginning of South America Chapter
PSS Handgun Fireplace of the mansion in Vista Mansion area
DSR-1 Sniper Rifle Obtained at the end of South America Chapter
VSS Sniper Rifle In the area after the power station, stick to the left and go all the way down the left path until you reach a house, on one side of the storehouse is the VSS.
XM8 Assault Rifle In Act 2. After you meet Drebin (so he can tell you about the B&B's), there are 2 paths you can take. Take the one on the left. It's in that area.

Custom Parts[edit]

Note: This is a list of all custom weapon parts found in South America, and is not a complete list as of yet.

Part Location
Weapon Scope Found in Power Station area by climbing the ladder on the tower that you can reach and hanging off the wire, and dropping down off the wire onto the other tower
Masterkey (Shotgun Attachment) Carried by certain PMC Soldiers in Vista Mansion area, either kill them or knock them out to get the part
XM203 (Grenade Launcher Attachment) Carried by certain PMC Soldiers in Vista Mansion area, either kill them or knock them out to get the part
Fore Grip B Mountain Trail area in the beginning. When Otacon mentions the road splits into two, take the road to the right where you see a PMC soldier urinating into the river. The attachment is there.

Tips[edit]

Well, now that you know the basics, here are a few tips to help you with weapons in the game.

  • Make sure you can hit your target: Don't just fire blindly at the target, get a bead on it, then fire!
  • Know your weapons: Make sure you know how your weapons fire and how to use them to the best of their abilities.
  • Grenades are your friend: Throw grenades to get enemies out from behind cover and to take out large clusters of enemies without wasting ammo.
  • Silencers will save your life: If you need to take out an enemy, for Pete's Sake, use a weapon with a Silencer! Even if there are only a few enemies in the area, those few could turn into many if they detect you because they heard your gunshot.