How are the skins classified?

By perk class (or non-perk weapons), by rarity tier (Common, Uncommon, Rare, Exceptional, Master Craft, Exceedingly Rare / Precious) and by exterior (Mint, Field-Tested, Battle-Scarred).

Where do these skins come from?

They can be bought on the Steam Market, uncrated from USB cases or found as in-game drops.

Vault, Items & Cosmetics

KF2 Weapon Skins Gallery: Market, USB Cases and Drops

A community screenshot gallery of weapon skins in Killing Floor 2 that can be purchased from the Steam Market, uncrated from USB cases or found as drops. The author listed each skin with its perk class, tier and exterior and promised to add new ones as he acquired them, crediting any player who sent a screenshot of a missing skin. For other catalogs see Vault weapon skins by perk and prestige weapon skins.

How the list is organized

Perk class: non-perk weapons, Berserker, Commando, Support, Field Medic, Demolitionist, Firebug, Gunslinger.
Tier: Common, Uncommon, Rare, Exceptional, Master Craft, Exceedingly Rare (Precious).
Exterior: Mint, Field-Tested, Battle-Scarred.

Some screenshots are not perfect; the author planned to replace them.

Non-perk weapons

Tier	Weapon	Skin	Exterior
Rare	9mm	Bloated	Mint
Rare	9mm	Bloated	Battle-Scarred
Rare	Katana	Cyberbone	Mint
Rare	Katana	Cyberbone	Field-Tested
Rare	Katana	Cyberbone	Battle-Scarred

9mm | Bloated | Mint.

9mm | Bloated | Battle-Scarred.

Katana | Cyberbone | Mint.

Katana | Cyberbone | Field-Tested.

Katana | Cyberbone | Battle-Scarred.

Berserker

Tier	Weapon	Skin	Exterior
Rare	VLAD-1000 Nailgun	Arachnid	Battle-Scarred
Exceptional	Crovel	Grave Digger	Battle-Scarred
Exceedingly Rare (Precious)	Crovel	Precious	-

VLAD-1000 Nailgun | Arachnid | Battle-Scarred.

Crovel | Grave Digger | Battle-Scarred.

Crovel | Precious.

Commando

Tier	Weapon	Skin	Exterior
Common	L85A2	Woodland	Battle-Scarred
Common	L85A2	Woodland	Field-Tested
Common	L85A2	Woodland	Mint
Common	SCAR	Woodland	Battle-Scarred
Common	SCAR	Woodland	Field-Tested
Rare	AR-15	Cyberbone	Field-Tested
Rare	AR-15	Cyberbone	Battle-Scarred
Rare	AR-15	Tactical	Field-Tested
Rare	L85A2	Aeronaut	Battle-Scarred
Rare	L85A2	Predator	Field-Tested
Rare	AK-12	Cyberbone	Mint
Rare	AK-12	Cyberbone	Field-Tested
Rare	AK-12	Cyberbone	Battle-Scarred
Rare	SCAR	Clot Commando	Mint
Rare	SCAR	Clot Commando	Field-Tested
Exceptional	AK-12	Horzine Elite Green	Battle-Scarred
Exceedingly Rare (Precious)	AR-15	Precious	-

L85A2 | Woodland | Battle-Scarred.

L85A2 | Woodland | Field-Tested.

L85A2 | Woodland | Mint.

SCAR | Woodland | Battle-Scarred.

SCAR | Woodland | Field-Tested.

AR-15 | Cyberbone | Field-Tested.

AR-15 | Cyberbone | Battle-Scarred.

AR-15 | Tactical | Field-Tested.

L85A2 | Aeronaut | Battle-Scarred.

L85A2 | Predator | Field-Tested.

AK-12 | Cyberbone | Mint.

AK-12 | Cyberbone | Field-Tested.

AK-12 | Cyberbone | Battle-Scarred.

SCAR | Clot Commando | Mint.

SCAR | Clot Commando | Field-Tested.

AK-12 | Horzine Elite Green | Battle-Scarred.

AR-15 | Precious.

Support

Tier	Weapon	Skin	Exterior
Common	Boomstick	Woodland	Battle-Scarred
Common	Boomstick	Woodland	Field-Tested
Common	Boomstick	Woodland	Mint
Uncommon	SG 500	Dosh	Field-Tested
Rare	SG 500	Predator	Mint
Rare	Boomstick	Sharkteeth	Battle-Scarred
Rare	Boomstick	Sharkteeth	Mint
Rare	M4	Stories of War	Battle-Scarred
Rare	M4	Stories of War	Field-Tested
Rare	M4	Monster Killer	Battle-Scarred
Rare	M4	Monster Killer	Field-Tested
Rare	AA-12	Fleshpounder	Mint
Rare	AA-12	Fleshpounder	Battle-Scarred
Rare	AA-12	Cyberbone	Field-Tested
Rare	AA-12	Cyberbone	Battle-Scarred
Exceedingly Rare (Precious)	SG 500	Precious	-

Boomstick | Woodland | Battle-Scarred.

Boomstick | Woodland | Field-Tested.

Boomstick | Woodland | Mint.

SG 500 | Dosh | Field-Tested.

SG 500 | Predator | Mint.

Boomstick | Sharkteeth | Battle-Scarred.

Boomstick | Sharkteeth | Mint.

M4 | Stories of War | Battle-Scarred.

M4 | Stories of War | Field-Tested.

M4 | Monster Killer | Battle-Scarred.

M4 | Monster Killer | Field-Tested.

AA-12 | Fleshpounder | Mint.

AA-12 | Fleshpounder | Battle-Scarred.

AA-12 | Cyberbone | Field-Tested.

AA-12 | Cyberbone | Battle-Scarred.

SG 500 | Precious.

Field Medic

Tier	Weapon	Skin	Exterior
Exceptional	HMTech-101 Pistol	Carbon Fiber	Mint
Exceptional	HMTech-201 SMG	Carbon Fiber	Mint
Exceedingly Rare (Precious)	HMTech-101 Pistol	Precious	-

HMTech-101 Pistol | Carbon Fiber | Mint.

HMTech-201 SMG | Carbon Fiber | Mint.

HMTech-101 Pistol | Precious.

Demolitionist

Tier	Weapon	Skin	Exterior
Uncommon	HX25	Tiger	Field-Tested
Uncommon	M79	Tiger	Mint
Uncommon	RPG-7	Tiger	Battle-Scarred
Rare	M79	Stories of War	Field-Tested
Exceptional	M79	Peace Maker	Battle-Scarred
Exceedingly Rare (Precious)	HX25	Precious	-

HX25 | Tiger | Field-Tested.

M79 | Tiger | Mint.

RPG-7 | Tiger | Battle-Scarred.

M79 | Stories of War | Field-Tested.

M79 | Peace Maker | Battle-Scarred.

HX25 | Precious.

Firebug

Tier	Weapon	Skin	Exterior
Rare	Caulk 'n Burn	Dragonfire	Battle-Scarred
Rare	Dragon's Breath	Dragonfire	Mint
Rare	Dragon's Breath	Dragonfire	Battle-Scarred
Rare	Fireman's Knife	Dragonfire	Mint
Rare	Fireman's Knife	Dragonfire	Field-Tested
Rare	Fireman's Knife	Dragonfire	Battle-Scarred
Master Craft	Dragon's Breath	Heat	Mint
Exceedingly Rare (Precious)	Caulk 'n Burn	Precious	-

Caulk 'n Burn | Dragonfire | Battle-Scarred.

Dragon's Breath | Dragonfire | Mint.

Dragon's Breath | Dragonfire | Battle-Scarred.

Fireman's Knife | Dragonfire | Mint.

Fireman's Knife | Dragonfire | Field-Tested.

Fireman's Knife | Dragonfire | Battle-Scarred.

Dragon's Breath | Heat | Mint.

Caulk 'n Burn | Precious.

Gunslinger

Tier	Weapon	Skin	Exterior
Rare	1858 Revolver	Blood Camo	Field-Tested
Exceedingly Rare (Precious)	1858 Revolver	Precious	-

1858 Revolver | Blood Camo | Field-Tested.

1858 Revolver | Precious.

FAQ

How are the skins classified?: By perk class (or non-perk weapons), by rarity tier (Common, Uncommon, Rare, Exceptional, Master Craft, Exceedingly Rare / Precious) and by exterior (Mint, Field-Tested, Battle-Scarred).
Where do these skins come from?: They can be bought on the Steam Market, uncrated from USB cases or found as in-game drops.