Mods

Mods are items that can be applied to weapons to receive various benefits. They are applied to weapons in the Weapons menu, which is found in the Unlocks tab.

Basics

The Mods page for the M82.

Mods can be obtained by finishing waves on any difficulty; the higher the difficulty, the higher the chance a mod will drop upon a wave completion. You can also buy mods via ROBUX. Similarly to Perks, every weapon has a specific number of mod slots that can be increased by leveling the weapon up (1 slot every 3 levels, up to Level 12) through gameplay, with an additional slot being unlocked by beating Wave 30 on Impossible mode. Like locking perks, mods installed in weapons will be locked and receive a red border once you leave spawn for the first time in a game. They can only be removed once the current game session ends.

When a mod is received, both the tier and the type of the mod are randomized, with higher tiers being rarer. Every mod has five tiers, with higher tiers providing stronger bonuses. All mods can both positively and negatively impact a weapon; negative effects are only seen starting with Tier 2 mods. Some mods can only be applied to specific types of weapons, and no mod can be applied to utility or consumable items. You can upgrade a mod to a tier higher if you own 4 of the same mod of the same tier. Recycling a mod gives 2 random mods that are a tier lower than the recycled mod.

It can be assumed that the formula for mod bonuses is PositiveStat*Tier & NegativeStat*(Tier-1).

Mod stats stacks additively with additional mods, but are multiplicative with Perk bonuses, with the exception of Lucky and Unlucky Mods, in which the crit chance/damage bonuses are additive.

Mods

Mod Name	Tier 1 (74.5%)	Tier 2 (19.2%)	Tier 3 (4.8%)	Tier 4 (1.2%)	Tier 5 (0.3%)	Incompatible with
Sniper Mod	Accuracy +2% Range +2%	Accuracy +4% Range +4% Attack Speed -0.5%	Accuracy +6% Range +6% Attack Speed -1%	Accuracy +8% Range +8% Attack Speed -1.5%	Accuracy +10% Range +10% Attack Speed -2%	N/A
Loaded Mod	Magazine Size +2.5%	Magazine Size +5% Max Ammo -1.25% Reload Speed -0.5%	Magazine Size +7.5% Max Ammo -2.5% Reload Speed -1%	Magazine Size +10% Max Ammo -3.75% Reload Speed -1.5%	Magazine Size +12.5% Max Ammo -5% Reload Speed -2%	Weapons w/ infinite or no Ammo Reserve
Rapid Mod	Attack Speed +1.2%	Attack Speed +2.4% Damage -0.5%	Attack Speed +3.6% Damage -1%	Attack Speed +4.8% Damage -1.5%	Attack Speed +6% Damage -2%	N/A
Volley Mod	Attack Speed +1% Reload Speed +1%	Attack Speed +2% Reload Speed +2% Velocity -2.5%	Attack Speed +3% Reload Speed +3% Velocity -5%	Attack Speed +4% Reload Speed +4% Velocity -7.5%	Attack Speed +5% Reload Speed +5% Velocity -10%	Weapons w/ no Velocity
Spray Mod	Attack Speed +1.2%	Attack Speed +2.4% Accuracy -1.25%	Attack Speed +3.6% Accuracy -2.5%	Attack Speed +4.8% Accuracy -3.75%	Attack Speed +6% Accuracy -5%	Melee Weapons
Lucky Mod	Critical Chance +0.5%	Critical Chance +1% Damage -0.5%	Critical Chance +1.5% Damage -1%	Critical Chance +2% Damage -1.5%	Critical Chance +2.5% Damage -2%	Launchers
Unlucky Mod	Critical Damage +5%	Critical Damage +10% Critical Chance -0.5%	Critical Damage +15% Critical Chance -1%	Critical Damage +20% Critical Chance -1.5%	Critical Damage +25% Critical Chance -2%	Launchers
Heavy Mod	Damage +0.8%	Damage +1.6% Attack Speed -0.6%	Damage +2.4% Attack Speed -1.2%	Damage +3.2% Attack Speed -1.8%	Damage +4% Attack Speed -2.4%	N/A
CQB Mod	Damage +0.8%	Damage +1.6% Range -2.5% Accuracy -0.5%	Damage +2.4% Range -5% Accuracy -1%	Damage +3.2% Range -7.5% Accuracy -1.5%	Damage +4% Range -10% Accuracy -2%	Melee Weapons
Glass Mod	Damage +0.8%	Damage +1.6% Resistance -2.5%	Damage +2.4% Resistance -5%	Damage +3.2% Resistance -7.5%	Damage +4% Resistance -10%	N/A
MOAB Mod	Damage +0.5% Explosive Radius +0.5%	Damage +1% Explosive Radius +1% Reload Speed -0.75%	Damage +1.5% Explosive Radius +1.5% Reload Speed -1.5%	Damage +2% Explosive Radius +2% Reload Speed -2.25%	Damage +2.5% Explosive Radius +2.5% Reload Speed -3%	Weapons w/ no Radius
Explosive Mod	Explosive Radius +1%	Explosive Radius +2% Damage -0.5%	Explosive Radius +3% Damage -1%	Explosive Radius +4% Damage -1.5%	Explosive Radius +5% Damage -2%	Weapons w/ no Radius
Ammo Mod	Magazine Size +1% Max Ammo +1.5%	Magazine Size +2% Max Ammo +3% Reload Speed -1%	Magazine Size +3% Max Ammo +4.5% Reload Speed -2%	Magazine Size +4% Max Ammo +6% Reload Speed -3%	Magazine Size +5% Max Ammo +7.5% Reload Speed -4%	Melee Weapons
Greed Mod	Money +0.8%	Money +1.6% Damage -0.5% Attack Speed -0.5%	Money +2.4% Damage -1% Attack Speed -1%	Money +3.2% Damage -1.5% Attack Speed -1.5%	Money +4% Damage -2% Attack Speed -2%	N/A
End Mod	Damage +0.4% Attack Speed +0.6%	Damage +0.8% Attack Speed +1.2% Money -1.25%	Damage +1.2% Attack Speed +1.8% Money -2.5%	Damage +1.6% Attack Speed +2.4% Money -3.75%	Damage +2% Attack Speed +3% Money -5%	N/A
Penetration Mod	Pierce +1% Armor Pierce +3%	Pierce +2% Armor Pierce +6% Magazine Size -1.25%	Pierce +3% Armor Pierce +9% Magazine Size -2.5%	Pierce +4% Armor Pierce +12% Magazine Size -3.75%	Pierce +5% Armor Pierce +15% Magazine Size -5%	Weapons w/ <5 Shots in Mag
Swift Mod	Reload Speed +1.5%	Reload Speed +3% Magazine Size -0.75%	Reload Speed +4.5% Magazine Size -1.5%	Reload Speed +6% Magazine Size -2.25%	Reload Speed +7.5% Magazine Size -3%	Weapons w/ <5 Shots in Mag
Tank Mod	Resistance +1.2%	Resistance +2.4% Attack Speed -0.5%	Resistance +3.6% Attack Speed -1%	Resistance +4.8% Attack Speed -1.5%	Resistance +6% Attack Speed -2%	N/A
Perfect Mod	Damage +0.3% Attack Speed +0.3% Reload Speed +0.3%	Damage +0.6% Attack Speed +0.6% Reload Speed +0.6%	Damage +0.9% Attack Speed +0.9% Reload Speed +0.9%	Damage +1.2% Attack Speed +1.2% Reload Speed +1.2%	Damage +1.5% Attack Speed +1.5% Reload Speed +1.5%	N/A
Velocity Mod	Velocity +3% Range +2%	Velocity +6% Range +4% Damage -0.25%	Velocity +9% Range +6% Damage -0.5%	Velocity +12% Range +8% Damage -0.75%	Velocity +15% Range +10% Damage -1%	N/A

Chance to get a Mod

Night	Normal Mod Chance	Career Mode
1-4	13.3%	6.7%
5-9	16%	8%
10	18.7%	9.3%
11-14	18.7%	12.6%
15-19	21.3%	14.4%
20	24%	16.2%
21-24	24%	20.4%
25-29	26.7%	22.7%
30	29.3%	24.9%
31-34	29.3%	30.1%
35-39	32%	32.8%
40	34.7%	35.5%
41-44	34.7%	41.6%
45-49	37.3%	44.8%
50	40%	48%

Trivia

• When a player obtains a tier 5 mod from surviving the night, a message in chat will say "Username has found a Tier 5 Type Mod!".
  • It is unlikely to obtain a tier 5 mod from solely surviving a wave. One occurrence is in this video: https://www.youtube.com/watch?v=aKF7SIFmaps&t=286s
  • With Career Night 1-4, the lowest chance to gain a tier 5 mod from surviving a night is about ~1 in 4975.
    • The highest chance to gain a tier 5 mod is a bit unclear, because while 200% mod rewards on Impossible would make Night 50 have an 80% chance to obtain a mod, B_Ketchup has said that Night 50 Impossible is only a 70% chance for a mod. It is unknown if this figure is still accurate.
      • If assuming the mod chance is 80%, it would be ~1 in 417 chance to get a T5 mod.
      • If assuming the mod chance is 70%, it would be ~1 in 476 chance to get a T5 mod.
      • If assuming the mod chance is 100% (By purchasing Double Mod Chance), it would be a 0.3% chance to get a T5 mod.
• Since it takes 4 mods of a lower tier to upgrade it to a lower tier, it will take 256 tier 1 mods, 64 tier 2 mods, 16 tier 3 mods, or 4 tier 4 mods to get a tier 5.