Pistol mod

There are five types of mod for pistols, each providing a different benefit. For each type, there is one basic mod and two upgrades which provide a greater benefit, but with detrimental effects. Only the basic mods are available at the first tier in singleplayer.

Barrel

 * Pistol Barrel: Enhances a weapon's barrel, creating greater gunfire velocity and impact.
 * Pistol Long Barrel: Substantially increases damage, but reduces clip size.
 * Pistol Short Barrel: Substantially increases damage, but at the cost of accuracy.

An equipped barrel mod changes the silhouette of a weapon.

Magazine

 * Pistol Magazine: Increases magazine capacity, allowing more shots before reloading.
 * Pistol Heavy Magazine: Substantially increases clip size, but at the cost of increased weight.
 * Pistol Light Magazine: Substantially increases clip size, but at the cost of reload speed.

An equipped magazine mod changes the color of parts of a weapon to a dull red.

Melee

 * Pistol Melee Optimizer: Integrated VI improves synergy between melee weapon and firearm computer systems, allowing increased melee damage.
 * Pistol Heavy Melee: Substantially increases melee damage, but at the cost of accuracy.
 * Pistol Light Melee: Substantially increases melee damage, but at the cost of increased recoil.

An equipped melee mod changes the color of parts of a weapon to a dull brown.

Receiver

 * Pistol Receiver: Capacitor boosts kinetic coil generators, increasing shot penetration through solid objects.
 * Pistol Calibrated Receiver: Allows shots to significantly penetrate solid objects, but reduces clip size.
 * Pistol Quick Receiver: Allows shots to significantly penetrate solid objects, but reduces headshot/weak point damage.

The Scorpion cannot be equipped with a receiver.

An equipped receiver mod changes the color of parts of a weapon to a dull blue grey.

Scope

 * Pistol Scope: Simple optical scope to enhance stability while zoomed. Also increases accuracy while moving.
 * Pistol Heavy Scope: Substantially increases accuracy, but at the cost of increased weight.
 * Pistol Tactical Scope: Substantially increases accuracy, but at the cost of fire rate.
 * Pistol Targeting System: Specialized targeting system that increases accuracy of a modified weapon without using a scope.†

An equipped scope mod changes the silhouette of a weapon.