Recoil

Recoil is described as the physical kick of a weapon when firing, represented by the target reticule moving up a certain distance and/or shaking slightly. This can be countered be various recoil reduction mods, but remember that recoil is separate from a weapon's accuracy, which usually cannot be improved through modding. However, it is relevant to note that while gun accuracy will not improve through modding, and bullets will spread the same as they normally would, on weapons with high recoil or kick such as the Supra, the decreased recoil can make it easier to land shots enemies.

Accuracy is a separate mechanic from physical recoil, but both can go hand-in-hand with some weapons. it is described as the set path bullets will take when fired, the lower the number, the less accurate the weapon is. As mentioned above, accuracy usually cannot be improved through mods, however a few mods can decrease accuracy. Recoil however, can be relieved with various mods. Fire rate also increases recoil in some weapons, such as the Grakata, which require burst firing in order to counter heavy recoil without modding.
 * Heavy Caliber grants additional damage to rifles, at the cost of making the weapon's accuracy suffer. Weapons with 100 base accuracy will produce a new base accuracy number, rather then subtracting the mod effect number from 100.
 * Magnum Force grants additional damage to pistols, at the cost of making the weapon's accuracy suffer. Weapons with 100 base accuracy will produce a new base accuracy number, rather then subtracting the mod effect number from 100.
 * Vicious Spread grants additional damage to shotguns, at the cost of making the weapon's pellet spread increase. Shotguns with a large pellet cone already should avoid this mod, as it will require even closer combat in order to take advantage of the extra damage.
 * ​Tainted Shell is the only mod that increases accuracy, reducing pellet spread at the cost of a reduced fire rate. Fire rate decrease can be countered by Shotgun Spazz.
 * Stabilizer reduces the recoil of rifles, with no negative side effect.
 * Vile Precision reduces the recoil of rifles, while also reducing the base firing rate. The fire rate decrease can be countered with Speed Trigger. Best used on the Grakata to increase accuracy and ammo efficiency.
 * Stabilizer reduces the recoil of pistols, with no negative side effect.