Mass Effect 3: Weapon modifications - list of all Mass Effect 3 guide, walkthrough
Last update: 29 October 2022
On this page of the game guide we have prepared an overview of the weapon upgrades available in Mass Effect 3. You will learn where to buy or find new upgrades, as well as which weapon types they fit.
Notice! The table seen below is only about the weapon mods you may find during the singleplayer campaign. In the multiplayer mode (Galaxy at War) the only way to obtain new upgrades is to keep purchasing crates with random equipment, hoping for good luck. The last column of the table explains how you can receive/find/buy a certain weapon mod.
Notice! The stores always offer better versions of upgrades, so for example if you have Assault Rifle Extended Barrel I and you'll purchase the same upgrade from the store you'll automatically transform your modification into Assault Rifle Extended Barrel II. If you don't see the weapon mod on the store's list make sure that you don't already have all of them or try visiting the same store later in the campaign (after completing one or more main quests).
UPGRADE NAME | UPGRADE CATEGORY | PRICE | WAY(S) OF OBTAINING THE WEAPON UPGRADE |
Scope | heavy pistol | 4000 | In the shop Aegohr Munition (Citadel: Presidium Commons). |
Scope | heavy pistol | - | Upgrade lies on the desk nearby the second control point (main quest Priority: Sur'Kesk). |
Scope | heavy pistol | - | Upgrade lies on the chest found after the third battle with Cerberus soldiers (secondary quest Tuchanka: Bomb). |
Scope | heavy pistol | - | Upgrade lies on the ground in one of the sanctuary's rooms (main quest Priority: Horizon). |
High caliber barrel | heavy pistol | 4000 | In the shop Elkoss Combine Arsenal Supplies (Citadel: Presidium Commons). |
High caliber barrel | heavy pistol | - | Upgrade lies on the shelve in the area behind the first control point (main quest Priority: Sur'Kesk). |
High caliber barrel | heavy pistol | - | Upgrade lies on the bed in the barrack nearby the airstrip (main quest African Traverse: Rachni). |
High caliber barrel | heavy pistol | - | Upgrade lies on the shelve in one of the rooms by the elevator (main quest Priority: Citadel #2). |
Piercing mod | heavy pistol | 4000 | In the shop Kassa Fabrication (Citadel: Presidium Commons). |
Piercing mod | heavy pistol | - | Upgrade is left in the first turian camp (main quest Priority: Palaven). |
Piercing mod | heavy pistol | - | Upgrade lies on the ground by the second Reapers' bound (main quest African Traverse: Rachni). |
Piercing mod | heavy pistol | - | Upgrade lies on the table in one of rooms nearby the elevator (main quest Priority: Citadel #2). |
Melee stunner | heavy pistol | 4000 | In the shop Kassa Fabrication (Citadel: Presidium Commons). |
Melee stunner | heavy pistol | - | Upgrade lies on the ground and you find it a while after reaching the place from which you can see the bomb (secondary quest Tuchanka: Bomb). |
Melee stunner | heavy pistol | - | Upgrade lies on the ground in the place where the road is broken (main quest Priority: Tuchanka). |
Melee stunner | heavy pistol | - | Upgrade lies on the ground in the shady part of the monastery (secondary quest Kallini: Ardat-Yakshi Monastery). |
Magazine upgrade | heavy pistol | 4000 | In the shop Kassa Fabrication (Citadel: Presidium Commons). |
Magazine upgrade | heavy pistol | - | Upgrade lies in the chests behind the first turian camp (main quest Priority: Palaven). |
Magazine upgrade | heavy pistol | - | Upgrade lies on the ground in the place where the road is broken (main quest Priority: Tuchanka). |
Magazine upgrade | heavy pistol | - | Upgrade lies on the bench outside the base (secondary quest N7: Cerberus Fighter Base). |
Concentration mod | sniper rifle | 4000 | In the shop Kanala Exports (Citadel: Presidium Commons). |
Concentration mod | sniper rifle | - | Upgrade is in the cupboard in the center of railway steering (main quest Priority: Mars). |
Concentration mod | sniper rifle | - | Upgrade lies on the boxes just near the ladder (secondary quest Tuchanka: Bomb). |
Concentration mod | sniper rifle | - | Upgrade lies on the balcony which is defended by the asari snipers (main quest Priority Thessia). |
Piercing mod | sniper rifle | 4000 | In the shop Cipritine Armory (Citadel: Presidium Commons). |
Piercing mod | sniper rifle | - | Upgrades is in the locker and you can unlock it only if David Archer participated in a meeting with Octavia (secondary quest Grissom Academy: Emergency Evacuation). |
Piercing mod | sniper rifle | - | Upgrade lies on the ground in a section with a dining room (main quest Priority: Citadel #2). |
Piercing mod | sniper rifle | - | Upgrade lies nearby the place you have to use the ladder (secondary quest Arrae: Ex-Cerberus Scientists). |
Extended barrel | sniper rifle | 4000 | In the shop Cipritine Armory (Citadel: Presidium Commons). |
Extended barrel | sniper rifle | - | Upgrade lies in the room behind the sterilizer (main quest Priority: Mars). |
Extended barrel | sniper rifle | - | Upgrade lies on the ground on the path leading to the meeting place with the lieutenant Victus (main quest Tuchanka: Turian Platoon). |
Extended barrel | sniper rifle | - | Upgrades lies on the cupboard in the room with the steering panel of an elevator (main quest Priority: Citadel #2). |
Enhanced scope | sniper rifle | 4000 | In the shop Kanala Exports (Citadel: Presidium Commons). |
Enhanced scope | sniper rifle | - | Upgrade lies on the ground nearby the place where the ship landed (secondary quest N7: Cerberus Laboratory). |
Enhanced scope | sniper rifle | - | Upgrade lies on the ground in the last camp (main quest Priority: Palaven). |
Enhanced scope | sniper rifle | - | Upgrade lies by the console and you find it during the way to the operating centre (main quest Priority: Geth Dreadnought). |
Spare thermal clip | sniper rifle | 4000 | In the shop Kassa Fabrication (Citadel: Presidium Commons). |
Spare thermal clip | sniper rifle | - | Upgrade lies in the turian camp on the path leading to the meeting place with the lieutenant Victus (main quest Priority: Palaven). |
Spare thermal clip | sniper rifle | - | Upgrade lies on the rocks (main quest Tuchanka: Turian Platoon). |
Spare thermal clip | sniper rifle | - | Upgrade lies on the ground in the shady part of the monastery (secondary quest Kallini: Ardat-Yakshi Monastery). |
Piercing mod | assault rifle | - | Upgrade lies on the ground by the exit from the first turian camp (main quest Priority: Palaven). |
Piercing mod | assault rifle | 4000 | In the Batarian State Arms (Citadel: Docks - Holding Area). |
Piercing mod | assault rifle | - | Upgrade lies on the table in the room where you meet first group of guards (main quest Priority: Citadel #2). |
Piercing mod | assault rifle | - | Upgrade lies on the metal balcony and you find it on your way to the main entrance to the Reapers' base (main quest Priority: Rannoch). |
Precision scope | assault rifle | 4000 | In the shop Cipritine Armory (Citadel: Presidium Commons). |
Precision scope | assault rifle | - | Upgrade lies on the cupboard in the Orion's hall (secondary quest Grissom Academy: Emergency Evacuation). |
Precision scope | assault rifle | - | Upgrade lies on the ground in one room next to the Great Hall (secondary quest Kallini: Ardat-Yakshi Monastery). |
Precision scope | assault rifle | - | Upgrade lies by the console in the core's room (main quest Priority: Geth Dreadnought). |
Extended barrel | assault rifle | 4000 | In the shop Cipritine Armory (Citadel: Presidium Commons). |
Extended barrel | assault rifle | - | Upgrade is in the first room of underground facility (main quest Priority: Sur'Kesk). |
Extended barrel | assault rifle | - | Upgrade lies on the ground in the last area in the first part of ruins just before going to the vicinity of the Reaper (main quest Priority: Tuchanka) |
Extended barrel | assault rifle | - | Upgrade lies on the path leading to the temple (main quest Priority Thessia). |
Stability damper | assault rifle | 4000 | In the shop Kassa Fabrication (Citadel: Presidium Commons). |
Stability damper | assault rifle | - | Upgrade lies on the stairs, and you find it before reaching the Orion's hall (secondary quest Grissom Academy: Emergency Evacuation). |
Stability damper | assault rifle | - | Upgrade lies on the boxes nearby the beginning place (secondary quest Kallini: Ardat-Yakshi Monastery). |
Stability damper | assault rifle | - | Upgrade lies on the ground nearby the place in which you see a closing cover (main quest Priority: Rannoch). |
Magazine upgrade | assault rifle | 4000 | In the shop Kassa Fabrication (Citadel: Presidium Commons). |
Magazine upgrade | assault rifle | - | Upgrade lies nearby the landing field (main quest Priority: Palaven). |
Magazine upgrade | assault rifle | - | Upgrade lies on the ground nearby the weapon modification bench (secondary quest Arrae: Ex-Cerberus Scientists). |
High caliber barrel | submachine gun | 4000 | In the Nos Astra Sporting Goods (Citadel: Presidium Commons). |
High caliber barrel | submachine gun | - | Upgrade lies on the ground in the barrack in the krogan's camp (main quest African Traverse: Rachni). |
High caliber barrel | submachine gun | - | Upgrade lies on the chest nearby the place where you find a satellite console (secondary quest Arrae: Ex-Cerberus Scientists). |
High caliber barrel | submachine gun | - | Upgrade lies on the boxes nearby the beginning place (main quest Priority: Rannoch). |
Scope | submachine gun | 4000 | In the shop Aegohr Munition (Citadel: Presidium Commons). |
Scope | submachine gun | - | Upgrade lies on the table in the shady room (main quest Priority: Mars). |
Scope | submachine gun | - | Upgrade lies on the ground in the last area in the first part of ruins just before going to the vicinity of the Reaper (main quest Priority: Tuchanka) |
Scope | submachine gun | - | Upgrade lies by the console in the operation center (main quest Priority: Geth Dreadnought). |
Heat sink | submachine gun | 4000 | In the shop Aegohr Munition (Citadel: Presidium Commons). |
Heat sink | submachine gun | - | Upgrade lies on the desk, nearby the meeting place with Reiley (secondary quest Grissom Academy: Emergency Evacuation). |
Heat sink | submachine gun | - | Upgrade lies on the ground by the place of the third battle (secondary quest Tuchanka: Bomb). |
Heat sink | submachine gun | - | Upgrade lies nearby the entrance to the temple (main quest Priority: Thessia). |
Magazine upgrade | submachine gun | 4000 | In the shop Kanala Exports (Citadel: Presidium Commons). |
Magazine upgrade | submachine gun | - | Upgrade lies nearby the Cerberus spaceships (secondary quest Grissom Academy: Emergency Evacuation). |
Magazine upgrade | submachine gun | - | Upgrade lies on the boxes nearby the beginning place (main quest Tuchanka: Turian Platoon). |
Magazine upgrade | submachine gun | - | Upgrade lies on the ground; you find it on your way to the two last anti-aircraft cannons (main quest Rannoch: Admiral Koris). |
Ultralight materials | submachine gun | 4000 | In the Nos Astra Sporting Goods (Citadel: Presidium Commons). |
Ultralight materials | submachine gun | - | Upgrade lies on the ground nearby the weapon modification bench (main quest Priority: Mars). |
Ultralight materials | submachine gun | - | Upgrade lies on the path leading to the battle with the second Reaper (main quest Tuchanka: Turian Platoon). |
Ultralight materials | submachine gun | - | Upgrade lies on the ground nearby the place from which you watch the closing cover (main quest Priority: Rannoch). |
Blade attachment | shotgun | 4000 | In the Batarian State Arms (Citadel: Docks - Holding Area). |
Blade attachment | shotgun | - | Upgrade lies on the shelve near the place where you meet first group of enemies (main quest Priority: Sur'Kesh). |
Blade attachment | shotgun | - | Upgrades you find just after the first battlefield (secondary quest Tuchanka: Bomb). |
Blade attachment | shotgun | - | Upgrade lies on the table in the area which you lower the ladder (main quest Priority: Horizon). |
Smart choke | shotgun | 4000 | In the Batarian State Arms (Citadel: Docks - Holding Area). |
Smart choke | shotgun | - | Upgrade lies on the path leading to the battle with the third Reaper (main quest Tuchanka: Turian Platoon). |
Smart choke | shotgun | - | Upgrade lies near the damaged road (main quest Priority: Tuchanka) |
Smart choke | shotgun | - | Upgrade lies on the boxes nearby the beginning place (main quest Priority: Geth Dreadnought). |
High calliber barrel | shotgun | 4000 | In the Batarian State Arms (Citadel: Docks - Holding Area). |
High calliber barrel | shotgun | - | Upgrades is in the room with the sterilizer (main quest Priority: Mars). |
High calliber barrel | shotgun | - | Upgrade lies on the ground in the second part of scientists' base (secondary quest Arrae: Ex-Cerberus Scientists). |
Shredder mod | shotgun | 4000 | In the Elkoss Combine Arsenal Supplies (Citadel: Presidium Commons). |
Shredder mod | shotgun | - | In the cupboard you find after using the second railway (main quest Priority: Mars). |
Shredder mod | shotgun | - | Upgrade lies in the cave in which you meet the first ravager (main quest African Traverse: Rachni). |
Shredder mod | shotgun | - | Upgrade lies on the ground; you find it on your way to the two last anti-aircraft cannons (main quest Rannoch: Admiral Koris). |
Spare thermal clip | shotgun | 4000 | In the shop Kassa Fabrication (Citadel: Presidium Commons). |
Spare thermal clip | shotgun | - | Upgrade lies on the ground nearby the place where flames appear (main quest Priority: Sur'Kesh). |
Spare thermal clip | shotgun | - | Upgrade lies in the cave in which you meet the second and the third ravager (main quest African Traverse: Rachni). |
Spare thermal clip | shotgun | - | Upgrade lies on the shelve by the damaged ladder (secondary quest Arrae: Ex-Cerberus Scientists). |