Assault rifle mod

There are five types of mod for assault rifles, 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

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

An equipped barrel mod changes the silhouette of a weapon.

Magazine

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

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

Receiver

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

The M-37 Falcon, P.A.W., and Sovoa cannot be equipped with a receiver.

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

Scope

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

The Soned cannot be equipped with a scope.

An equipped scope mod changes the silhouette of a weapon.

Stock

 * AR Stock: Distributes recoil with sliding system of counterweights compatible with kinetic coil generators. Reduces weapon kickback.
 * AR Heavy Stock: Substantially reduces recoil, but at the cost of increased weight.
 * AR Light Stock: Substantially reduces recoil, but at the cost of reload time.

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