Gun Perk

Gun Perks are a feature in Call of Duty Online and Call of Duty: Infinite Warfare. In Call of Duty: Infinite Warfare, Gun Perks are available through Prototype Weapons, they add on different abilities to that weapon along with stat differences. They appear to be a evolution of the Perk system featured in Call of Duty: Ghosts as well at the Weapon Proficiency system from Call of Duty: Modern Warfare 3.

Common

 * Stockpile: Increased ammo. (Stacks with Extended Mag)
 * Stabiliity: Reduced recoil. (Stacks with Foregrip)
 * Focus: Reduced idle away while aiming down sights. Snipers: (Stacks with Ballistic CPU)
 * Readiness: Reload faster when mag is empty. (Stacks with Dexterity)
 * Steady: Reduced hip spread. (Stacks with Laser Sight)
 * Sharpshooter: Increased damage range. (Stacks with Particle Amp/Rifled Barrel/Speaker Amp)
 * Haste: Slightly increased movement speed.
 * Presence of Mind: Infinite hold breath duration.
 * Lights Out: Increases weapon melee speed.
 * Low Rider: Rediced hip fire spread while sliding.
 * Creeper: Increases movement speed while crouched.

Rare

 * Head Rush: Headshot kills grant a small bonus to your Payload meter.
 * Sensor: Damage causes target to show on minimap.
 * Deathbringer: Double kills instantly reload your magazine.
 * Refund: Missed bullets can return to your ammo stock.
 * Jackpot: Kills grant an additional 10% score.
 * Scrambler: Kills hide nearby friendlies from radar.
 * Headhunter: Headshot kills instantly refill your magazine.
 * Stacked: Reduced the time between burst fires and increases recoil.
 * On Point: Speeds up aiming and reduces hip fire accuracy. (Stacks with Quickdraw)

Legendary

 * Roll the Dice: Gain 1 random attachment when you spawn.
 * Refresher: 5 player kill streak restores 1 lethal and tactical.
 * Gambler: 3 player kill steaks earn a random perk (3 max). Expires upon death.
 * Hitman: Killing all enemy player grants a large bonus to your Payload meter.
 * Glacial: Damage temorarily slows target movement speed.
 * Nuclear: 25 player kill streak earns a De-Atomizer Strike.

Epic
Epic weapon perks are unique to their respective Epic variant. This means that no other weapon variant in game will have the same Epic Gun Perk.
 * Break Point: This weapon fires as fully automatic with reduced recoil. (R3K - R3KT)
 * Precision: Infinite damage range. (NV4 - Flatline)
 * Jawbreaker: Bonus headshot damage, reduced damage towards legs. (KBAR-32 - Invective)
 * Eighty Seven: Alternate mode now fires as akimbo shotguns. (Type-2 - Butcher)
 * Reckless: Increased fire rate. (RPR Evo - Ripper)
 * Master Key: This gun has an under barrel shotgun. (Erad: Cerberus)
 * Make it Rain: Double magazine size. Can no longer reload. (R.A.W. - Liberty)
 * Heavy Hitter: Double damage. Slower fire rate. (Mauler - Mammoth)
 * Hunter Killer (gun perk): Enemies at low health are highlighted. (EBR-800 - Osiris)
 * Awareness: Mini-map stays active while scoped. (KBS Longbow - Big Brother)
 * Surplus: Enemies drop scorestreak pack for your team when killed. (Reaver - RODEO)
 * Shockwave: Damage causes slight hearing loss. (Banshee - Siren)
 * Lifelink: Infinite ammo. Inflicts self damage when fired. (DCM-8 - Masochist)
 * Overcharged (gun perk): Charged, powerful single shot. (Oni - Kaiken)
 * Lucky 7: This gun unloads half its magazine on each shot. (EMC - Avalanche)
 * Invigorate: Killing an enemy refills a portion of your health. (FHR-40 - Windfall)
 * Rush Down: Greatly reduced spread while jumping and sliding. (Karma-45 - Phobos)
 * Celerity: Increases hip fire rate and reduces aim down sights fire rate. (NV4 - Chaos)
 * Feeder: Reduces rechamber time and reduces movement speed. (KBS Longbow - Harbinge)
 * Sonic Boom (gun perk): Stacked high frequency blast with each trigger pull. (Banshee - Doppler)
 * Spike: Deals increased damage, but fires 1 bullet at a time. (Volk - Goliath)
 * Hax: This weapon has a custom Trojan sight. (Titan - Scout)
 * Triad: Charged, 3 shot sniper burst. (EBR-800 - Bomber)
 * Reflex (gun perk): Comes with a custom Reflex Sight instead of a scope. (DMR-1 - Spectacle)
 * Mo' Money: Every kill grants extra experience. (Volk - Corruption)
 * Shredder (gun perk): Melee stacks with this weapon cause enemies to explode. (Reaver - Machete)
 * Below the Belt: Bonus damage towards the groin instead of headshots. (RPR Evo - Bosozuku)
 * Focus Fire: Hip fire spread reduced with each shot. (DCM-8 - Epitaph)
 * Slug: Fires a single powerful bullet. (Rack-9 - Smoothbore)
 * Trigger Happy: Fires powerful bullets with heavy recoil. (Hailstorm - Ordnance)
 * Whirlwind: Fast cycling auto burst that increases recoil. (Hailstorm - Thunder)
 * Hit and Run: Normal movement speed when aiming down sights. (Kendall 44 - Cartel)
 * SBD: Comes with advanced Surppressor with normal damage range. (Widowmaker - Smoke)
 * Twinsanity: Akimbo with reduced hip spread. Can no longer aim down sights. (HVR - Gemini)