Call of Duty: Modern Warfare – 15 Secret Gun Variants You Can Create | Gunsmith Guide

The new Gunsmith tool in Call of Duty: Modern Warfare lets you truly customize your weapons — and some weapons can be transformed totally into entirely different weapons. Everyone has their favorites from the series, and thanks to a whole lot of community effort, there are some awesome alternate weapons you can craft using the Gunsmith station.

Once separated into multiple different weapons, the humble MP5 can be transformed into an MP5K, or the stealth MP5SD. The M4AI can turn into a classic M16, and the AK-47 can become a lead-slinging MPK. There are way more variants that don’t just change how these weapons work, but alter the model enough to match favorite weapons from the long history of Modern Warfare. Let’s dive in and see what we can create together.

More Call of Duty: Modern Warfare guides:

10 Tips | Beginner’s Guide | Best Guns To Use In Multiplayer | How To Rank Up Fast| XP Guide | Ending Explained

15 Secret Gun Variants You Can Create | Gunsmith Guide

For this guide, we’re focusing on only ‘official’ gun variants. Nothing like the ridiculous (and now completely nerfed) 1-shot kill shotgun sniper rifle. This is all about transforming one gun into a different type of gun — in physical appearance, and in function.

Below, you’ll find descriptions on how to alter each weapon in the gunsmith. We’ll have the gun’s name, then a list of mods to swap to complete the weapon transformation.


  • Base Weapon: M4A1
  • Attachments: Stock M16 Grenadier Barrel, M-16 Stock, Burst-Fire Perk

Colt 9mm SMG

  • Base Weapon: M4A1
  • Attachments: FSS 11.5″ Commando Barrel, Forge TAC CQS Stock, 9mm Para 32-Round Mag


  • Base Weapon: M4A1
  • Attachments: Corvus Custom Barrel, Singuard Arms Invader Stock, .458 SOCOM 10-Round Magazine

Steyr AUG

  • Base Weapon: AUG
  • Attachments: 622mm Long Barrel, Integral 3.0x Optic, 5.56 NATO 30-Round Magazine

MCX SBR ‘Rattler’

  • Base Weapon: M13
  • Attachments: Tempus Cyclone Barrel, FFS Close-Quarters Stock, .300 Blackout 30-Round Mag


  • Base Weapon: AK-47
  • Attachments: 23.0″ Romanian Barrel, Field LMG Stock, 75-Round Drum Mag


  • Base Weapon: AK-47
  • Attachments: 8.1″ Compact Barrel, Skeleton Stock, 5.45x39mm 30-Roung Mag


  • Base Weapon: AK-47
  • Attachments: 23″ RPK Barrel, Field LMG Stock, Bipod, 75-Round Drum Mag, Bipod


  • Base Weapon: AK-47
  • Attachments: Spetsnaz Elite Barrel, Forge TAC Ultralight Stock, 5.45x39mm 30-Roung Mag


  • Base Weapon: MP5
  • Attachments: Subsonic Integral Suppressor


  • Base Weapon: MP5
  • Attachments: Tactical Suppressor, FFS Mini Barrel, FTAC Collapsible Stock, Ranger Foregrip


  • Base Weapon: MP5
  • Attachments: 10MM Auto 30-Round Magazine


  • Base Weapon: SA87
  • Attachments: SA87 25.4″ Factory Barrel, FFS SA87 Heavy Stock Pro, Bipod, 60-Round Mag


  • Base Weapon: EBR-14
  • Attachments: 22.0″ Forge TAC Precision Barrel, Sniper Scope, FFS Raider Chassis Elite Stock, Bipod, 20-Round Mag


  • Base Weapon: FN SCAR 17
  • Attachments: FORGE TAC CQC Pro Barrel, FTAC Collapsible Stock

That’s all the ‘secret’ gun variants we’ve found so far. If there are more, we’ll add them here!