Corlist's "Summary: special properties of weapons"

While most people already know 90% of these stuff, it is still useful for newbies and can serve as a central point of reference to all weapon testing posts all over the place.

For all weapon damage and DPS numbers: see Cyonan's sheets.

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Glossary of terms
Regenerating weapon: (#s regen delay)
This weapon does not have spare ammo and cannot benefit from such mods, abilities or gear.
After the #s regeneration delay, the weapon will begin to regenerate 33% of its max magazine capacity a second.
If the weapon overheats, there is an 4 second delay (technically a cancellable 4-second reload animation) before regeneration starts.

Projectile weapon
This weapon ignores armour damage reduction.
This weapon cannot penetrate cover or enemies.
As a result, certain mods (high-velocity barrel, piercing mods, shredder) have no effect.
This weapon ignores enemy shield gate (except for Krysae).
This weapon cannot score headshots unless otherwise stated.

Defence multipliers (#% armour, #% shields, #% barriers)
Does #% to specific defense types, 100% by default when not listed. Defence multipliers do not affect ammo damage.

Extended headshot multiplier: (#x)
Does #x damage on a headshot. 2.5x by default when not listed. Extended headshot multipliers is not applied on boss headshots and instead a default value of 1.4x is always used.

Native penetration: (#m)
The weapon is able to penetrate #m of cover or targets without AP ammo or mods equipped.
If a shot damages an enemy after penetration, no damage penalty is applied even with AP mods or ammo.

Burst weapon: (X shots with Ys refire delay.)
The weapon will fire up to X shots in a single trigger. The weapon cannot fire, reload or be changed for the Ys after the end of a burst. Abilities which increase rate of fire have no effect on refire delay.

Geth weapon
This weapon counts as a geth weapon for the purpose of Networked AI geth weapon bonus passives.

(#x ramp up multiplier) (condition)
This weapon’s base damage increases by #x. Essentially, the weapon’s base damage increases and it also affects ammo damage. Weapons with a variable ramp up condition will always do full ammo damage instead.

(#x) ammo consumption (condition)
This weapon will use #x more ammo per shot based on the listed condition. If there is no condition listed, ammo consumption applies at all times.

Variable RoF: (caps at # RPM) (condition)
The weapon will slowly gain RoF as fire is sustained. After the duration listed in the ramp up delay, the RoF cap is reached at # RPM.

Minimum refire: (#s)
After each shot, the weapon will not be able to fire, reload or be changed for #s. Abilities which increase rate of fire have no effect on the minimum refire time.

Collector/Prothean weapon
Counts as a Collector or Prothean weapon for the Vengeful Ancient Collector or Prothean weapon passives.

Homing
Shots automatically seek targets which are targeted and close to the crosshairs.

(#%) unscoped damage multiplier
Only applies to sniper rifles. If this weapon is shot without looking through the scope, only #% damage will be dealt.

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Heavy Pistols

Predator
None

Phalanx
None

Arc Pistol
3x ramp up multiplier
Charge table
1 shot at 1x damage (0s - 0.39s)
1 shot at 3x damage (0.4s - 0.67s)
2 shots at 3x damage (0.68s - 0.99s)
3 shots at 3x damage (1s+)

Carnifex
None

Acolyte
Projectile weapon
Defence multipliers: 500% shields, 500% barriers
Takes approximately 1s charge to fire

Suppressor
Extended headshot multiplier: 4.0x

Executioner
Native penetration: 0.5m

Paladin
None

Scorpion
Projectile weapon
Detonates instantly when fired near enemy feet
Only applies ammo damage when the explosive sticks on enemy

Talon
Defence multipliers: 150% shields, 150% barriers
Fires 6 pellets

Eagle
None

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Sub-machine guns

Shuriken
Burst weapon: 6 shots with 0.5s refire delay

Tempest
None

Locust
Extended headshot multiplier: 3.0x

Hornet
Burst weapon: 3 shots with 0.15s refire delay

Geth Plasma SMG
Geth weapon
2.5x ramp up multiplier (after ramp up delay)
2x ammo consumption on damage ramp up
Variable RoF: caps at 720 RPM (after ramp up delay)
Ramp up delay: ~0.7s

Blood Pack Punisher
Fires a special AP shot on every 8th continuous shot fired
5x ramp up multiplier (on AP shots only)
Defence multipliers (AP shot only): 250% armour

Collector SMG
Collector/Prothean weapon
Defence multipliers: 150% armour
Regenerating weapon: 0s regen delay
2x ammo consumption at unknown intervals; total shots fired remain consistent
Does not work with the SMG heat sink mod

Hurricane
2x ammo consumption

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Assault Rifles

Avenger
None

Phaeston
None

Vindicator
Burst weapon: 3 shots with 0.25s refire delay

Mattock
None

Geth Pulse Rifle
Geth weapon
Extended headshot multiplier: 3.0x

Falcon
Projectile weapon
Minimum refire: 0.65s (Has no effect; unreachable even with 50% rof bonus)

Revenant
None

Argus
Burst weapon: 3 shots with 0.65s refire delay

Striker
Projectile weapon
Variable RoF: caps at 300 RPM (after ramp up delay)
Ramp up delay: ~0.83s
Does not break tactical cloak when activated after ramp up

Collector Assault Rifle
Collector/Prothean weapon

Adas Anti-Synthetic Rifle
Projectile weapon
Defence multipliers: 200% shields, 200% barriers
Minimum refire: 0.75s (Does not actually work; fires one shot every 0.48s normally)
Homing
Does not break tactical cloak when activated after ramp up

Lancer
Regenerating weapon: 1s regen delay

Geth Spitfire
Geth Weapon
Defence multipliers: 175% shields, 175% barriers
Variable RoF: caps at 800 600 RPM (after ramp up delay)
Ramp up delay: ~0.5s

Saber
Minimum refire: 0.75s (Does not actually work; 50% marksman RoF fired a shot every 0.5s)

Particle Rifle
Collector/Prothean weapon
4.0x ramp up multiplier (after ramp up delay)
2x ammo consumption on damage ramp up
Regenerating weapon: 1s regen delay
Ramp up delay: 2s

Cerberus Harrier
Has more recoil in cover rather than out of cover

N7 Typhoon
Defence multipliers: 150% armour, 150% shields, 150% barriers
1.5x ramp up multiplier (after ramp up delay)
2x ammo consumption on damage ramp up
Variable RoF: caps at 600 RPM (after ramp up delay)
Ramp up delay (RoF): ~0.75s
Ramp up delay (Damage): ~0.65s
Native penetration: 0.25m

Valkyrie
Burst weapon: 2 shots with 0.25s refire delay
Extended headshot multiplier: 3.0x

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Sniper Rifles
Mantis
35% unscoped damage multiplier

Viper
85% unscoped damage multiplier

Raptor
85% unscoped damage multiplier
Minimum refire: 0.15s (Caps its base 550 RPM to 400 RPM)

Incisor
50% unscoped damage multiplier
Burst weapon: 3 shots with 0.25s refire delay

Widow
50% unscoped damage multiplier
Native penetration: 0.5m

Kishock Harpoon Gun
Projectile weapon
Extended headshot multiplier: 3.0x
1.0x to 1.75x ramp up multiplier (after ramp up delay, variable)
Ramp up delay: 1.5s
Can hit guardians through shield
Damage split 60:40 between impact and DoT
DoT is delivered over a duration of 5s
Additive weapon bonuses (barrel, passives, rail amps) do not boost the DoT portion

Krysae Sniper Rifle
Defence multipliers: 150% armour
Projectile weapon (but does not ignore shield gate)
75% unscoped damage multiplier

Collector Sniper Rifle
Collector/Prothean weapon
75% unscoped damage multiplier
Regenerating weapon: 1s regen delay
2x ammo consumption (from 5th uninterrupted shot onwards. 50% RoF Marksman increases this to 6.)

Indra
50% unscoped damage multiplier

Black Widow
50% unscoped damage multiplier
Native penetration: 0.25m

Javelin
Geth weapon
Has a 0.25s delay before firing
50% unscoped damage multiplier
Native penetration: 1m
Scope highlights targets through solid object or smoke. Only targets which can be hit based on the penetration stacked is highlighted.

Valiant
50% unscoped damage multiplier

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All shotguns fires 8 pellets unless otherwise stated

Katana
None

Eviscerator
None

Scimitar
None

Disciple
Shots inflicts force on target

Graal Spike Thrower & here
Fires 6 spikes
Projectile weapon
Extended headshot multiplier: 3.0x
2x ramp up multiplier (after ramp up delay)
Ramp up delay: ~0.8s

Geth Plasma Shotgun
Fires 3 plasma balls
Geth weapon
Projectile weapon
0.45x to 1x ramp up multiplier (after ramp up delay, variable)
Ramp up delay: ~2s
2x ammo consumption after ~1s of charge
2nd and 3rd plasma ball hitting the same target will only inflict 30% damage
Ammo damage only applies to the first plasma ball hitting the target
Homing

Claymore
It's the best gun in the game

Reegar Carbine
Defence multipliers: 50% armour, 200% shields, 200% barriers
Has a 0.25s delay before firing
Shots misses targets randomly due to unknown factors
2x ammo consumption after ? shots/seconds

Piranha
None

AT-12 Raider
None

Wraith
None

Venom
Fires 1 grenade
Projectile weapon
1.25x ramp up multiplier (after ramp up delay)
Splits into 3 grenades after ramp up (damage split evenly between the 3)

Crusader
Fires 1 heavy slug
Native penetration: 0.5m
Shots will hit the point aimed 0.2s ago. In other words, it takes 0.2s for the crusader to "line up" accurately to wherever you are aiming at currently.