After the release of Call of Duty: Modern Warfare 2, players have been thinking to grind up their weapons while they try to get the highest Mastery Camos. Now, Infinity Ward has redesigned the way that weapons and attachments are unlocked with the introduction of Weapon Platforms. 

The STB 556 is an Assault Rifle in Modern Warfare 2 that is used mostly with a combination of certain attachments to lower its recoil and make it even more versatile. The weapon boasts high damage, but also has low mobility and stability that can be improved when it's TTK (Time To Kill) is reduced drastically. This article focuses on the best loadout for the STB 556. 

STB 556 was earlier known as the AUG A3 or Bullpup Rifle in Modern Warfare (2019) and is also used by the Austrian army today. In Modern Warfare 2, players must fulfill a few conditions in order to unlock it. 

The STB 556 takes some time to unlock as here players have to reach Rank 41, which is more than 250,000 XP. This journey can also be shortened by a few hours with the help of Double XP tokens. This is a weapon that can be unlocked by getting into a higher rank. 

If players want to unlock all attachments available for this weapon, the game needs them to achieve a certain level of other guns, unleashing the full potential of this Assault Rifle. 

The best attachments for the STB 556 are as follows: 

• Receiver: STB 556 

• Muzzle: Echoline GS-X 

• Barrel: 18” Bruen Guerilla 

• Laser: VLK LZR 7MW 

• Rear Grip: Stip-40 

• Underbarrel: FSS Sharkfin 90 

Firstly, the VLK LZR 7MW laser is an attachment having no flaws but there’s only one thing that it can be seen by enemies while in ADS mode. It increases ADS speed and also aiming stability, as well as sprint-to-fire speed. This way, it makes it one of the most important attachments for the STB 556. 

The 18” Bruen Guerilla barrel increases the bullet velocity of the weapon, bumping up damage range that comes in handy while engaging enemies from a distance. It also brings improvement in the recoil control but lowers movement speed and ADS speed, which has been compensated for by attaching the laser. 

Next comes the FSS Sharkfin 90 underbarrel which is another attachment having no flaws as it only increases idle aiming stability. The Stip-40 rear grip improves the recoil control, which is needed for an unstable weapon like that. Lastly, the Echoline GS-X muzzle is attached for suppressing sound and smoothening the recoil. 

If you wish to attach an optic than using iron sights, the Cronen Mini Pro is best for the STB 556 as it features thin bezels that show the enemy clearly, thus making it easy to track them. The muzzle can be removed in order to make space for this particular attachment.