[Katyusha]

Server [US/EU]: EU
Map: V33X
Description: SS Can use AMMO on any gun.
Bug is [In-Game/On Forums/Other]: SS can use the banned ammunition on any weapon.
Since when have you experienced the bug? Anytime I play SS
Additional Information: They can also use a ridiculous amount of attachments, but i can guess that's not a bug
Images/Screenshots: 

[evilmat360]

Discussed this with Faustie when it was released. They are not banned ammo types, it's intentional. IIRC, it's that the SS would be financed differently compared to the SWAT and Police so were given access to all attachments for the weapons.

Although not totally sure about them being able to use them on weapons that they are not supplied with by default, could be down to how the attachments are equipped on spawn.

[Faustie]

Yeah, attachments are specific to the player and not to the weapon; the weapon then has a certain amount of those available. So if you're an SS agent, your character will be given the ammo attachments which can be used anywhere. It's not ideal but it makes the SS class a little more interesting.