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Sig 556xi 5.56 NATO Rifle R556XI-16B-S

SKU: R556XI-16B-S

16" Barrel

Sig 556xi 5.56 NATO Rifle R556XI-16B-S

Sig 556xi 5.56 NATO Rifle R556XI-16B-S

SKU R556XI-16B-S

16" Barrel

  • This product has been discontinued.
FFL Restrictions

FFL Requirements
This item can only be shipped to a Licensed Federal Firearms Dealer. Please see our Shipping Policy to review firearms shipping requirements.

Export Restrictions

Government Export Restriction
This item may be regulated for export by the U.S. Department of State or the US Department of Commerce. Please see our Export Policy.

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ITAR Product
By adding to cart, I understand, acknowledge, and agree to the Export Policy. I am a US Person, and I do not intend to export this product. Please see our Export Policy.


SIG SAUER introduces the SIG556xi, the next generation of cutting edge tactical rifles from the leading manufacturer of military and law enforcement firearms.

Building on the innovation and reliability of the SIG556-series rifles, the SIG556xi offers greater adaptability to meet the needs of the end user.

The SIG556xi features a completely ambidextrous magazine release, bolt release and safety selector. The charging handle can be installed on either side, giving the shooter the ability to set the rifle up to meet his or her preferences.

A new barrel design makes it easy for armorers or gunsmiths to change barrels. The SIG556xi will first be available with a 16” button rifled chrome lined barrel, 1:7 twist and an A2 flash hider.

Flip-up front and rear sights, a two-stage trigger and an original Swiss side-folding stock are all standard features on the SIG556xi. The tried-and-true short-stroke piston system features a two-position gas valve for reliability in even the most demanding of environments.

A redesigned lower-profile M1913 quad-rail handguard is slimmer and lighter. A 10” short-barrel version will be available as part of the factory SBR program. The SIG556xi accepts any Mil-Spec AR15/M4/M16- style magazine.


Caliber:5.56 NATO
Weight:7.9 lbs
Rifle Overall Length:36.7"
Safety:Ambi Safety
Rifle Barrel Length:16"
Rifle Barrel Twist:1:7"
Rifle Stock:Swiss Folding Stock
Scope Mount:Quad Rail
Item ConditionNew


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