Multishot

Multishot describes the number of pellets (bullets, projectiles, bolts, etc.) the weapon will fire per attack. While multishot is a feature normally encountered mainly on shotguns, it can be added to any weapon through mods, effectively allowing you to fire more bullets without consuming extra ammunition. If the pellet count results in a fraction, the fractional part will be a chance to fire one more bullet. This option might be turned off in certain weapons.

Because every pellet has a chance to proc, increasing multishot will effectively increase the chance of obtaining a status effect.

Calculating Multishot

 * Weapon Pellet Count refers to the base amount of pellets fired per weapon attack.
 * Multishot Modifier refers to the total value of all related mods added together.

For example, a Hek with 120% multishot will have the pellet count of 15.4. This means it will fire 15 pellet per shot with a 40% chance of firing a 16th pellet.

Meanwhile, a Lex with 180% multishot will have a pellet count of 2.8. It will therefore fire 2 bullets with an 80% chance of a third bullet on that shot.

Since multishot only changes the weapon's pellet count, all additional pellets will behave identically to the originals, including mod effects, spread, elemental damage, etc. If the weapon has no spread at all, the additional bullets will overlap the original. This can be verified by using a weapon such as the Dera with and without Heavy Caliber to increase spread.

Note that the in-game UI will show the sum of all the pellets' damage, so actual damage may be lower on weapons with large spreads where some pellets may miss entirely.

Shotguns
The table below refers to Scattered Justice, a mod that also gives multishot but can only be installed on the Hek.

1) Due to the Kohm's unique firing mechanics this entry only refers to fully-spooled shots, for simplicity's sake. 2) This value refers to a combination of Scattered Justice and Hell's Chamber, both fully ranked.

Fire Accuracy
For rifles and single shot pistols, fire accuracy is calculated using the following formula:

Because of this, is possible to have a fire accuracy higher than 100% with a rifle or single shot pistol using a multishot mod. For example, if you hit 468 shots and fired 342 shots using a rifle during a mission:

Therefore, we can conclude the following:

Therefore, rifles can reach 190% accuracy, shotguns 220% and pistols 280% before counting Punch Through.