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For other variants, see 552 Commando and SIG SG 550
"Short range assault rifle, with low to medium stopping power depending on the caliber."
— In-game description

The 556xi is an assault rifle featured in Tom Clancy's Rainbow Six Siege. It is available for use by FBI SWAT Recruits and the Operator Thermite.

Situations and Terrorist HuntEdit

In the No Intel Situation, the character plays as Thermite equipped with a 556xi and an M45 MEUSOC as a sidearm.


The SIG SG 556 is a derivative of the SIG SG 550 assault rifle, and is the latest generation of the rifle series. The SIG SG 556 is a semi-automatic rifle manufactured by Swiss Arms AG that chambers the 5.56x45mm NATO round.[1]

In-game, description dictating otherwise, the 556xi excels at mid-to-long range engagements. While it's fire rate is nothing to shrug off at just below 700 RPM, it still leaves something to be desired in close range combat in comparison to faster firing weapons.

Weapon AttachmentsEdit

Under Barrel


Tom Clancy's Rainbow Six Siege

  • The 556xi incorrectly fires in full-auto mode in-game, despite the fact that the real SIG SG 556 can only fire in semi-automatic mode.[2]

Patch ChangesEdit


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