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Based on the legendary SG 550, the Sig Sauer SIG556xi Multi-Caliber Rifle allows operators a choice of caliber, barrel length, handguard/stock configurations and lower receivers while utilizing the time-tested rotating bolt and adjustable gas piston operating system. Click here to see video footage of this rifle in action.

A removable barrel allows the operator to select the preferred length for a specific mission, while adding the appropriate bolt can change the Sig Sauer SIG556xi Adaptable Rifle to any of three calibers—5.56x45mm NATO, 300 Blackout, and 7.62x39mm NATO. Users can also quickly change out the lower receiver to allowing the use of either AR-style magazines or AK-style magazines.

Barrels are available in 10”, 14.5”, and 16”. Truly ambidextrous, the SIG556xi features an ambi safety selector, magazine release and user swappable charging handle (right- or left-handed). Optional receiver end plates allow for the use of either AR receiver extension tubes and buttstocks or M1913 compatible stocks. Polymer handguards accept all Magpul light and rail kits, while the aluminum and carbon fiber handguards accept 2”, 4”, and 6” M1913 rails.

Military and law enforcement versions of the SIG556xi are capable of full-auto fire in every caliber, including 7.62x39mm.

SIG556xi
-Caliber: 5.56mm NATO
-Action Type: Semi-auto
-Operating System: Adjustable 3-Position Gas Piston System
-Trigger Pull: 7 lbs
-Trigger Type: MIL-SPEC 2-Stage
-Overall Length (Extended): 35.1”
-Overall Length (Folded): 26.0”
-Barrel Length: 16.0”
-Rifling: 1:7
-Number of grooves: 4
-Weight w/out Mag: 7.5 lbs
-Mag Capacity: 30 Rounds
-Mag Type: Aluminum GI
-Accessory Rail Optional – 2”, 4”, 6” M1913 Rail Sections
-Features: Adjustable 3-Position Gas Piston System, Flip-up Adjustable Iron Sights, Swiss Side-folding Stock with Removable Cheek Riser.
-MSRP: $1,599


SIG556xi Russian

-Caliber: 7.62x39mm NATO
-Action Type: Semi-auto
-Operating System: Adjustable 3-Position Gas Piston System
-Trigger Pull: 7 lbs
-Trigger Type: MIL-SPEC 2-Stage
-Overall Length (Extended): 35.1”
-Overall Length (Folded): 26.0”
-Barrel Length: 16.0”
-Rifling: 1:9.5
-Number of grooves: 4
-Weight w/out Mag: 7.5 lbs
-Mag Capacity: 30 Rounds
-Mag Type: AK-47 type
-Accessory Rail Optional – 2”, 4”, 6” M1913 Rail Sections
-Features: Adjustable 3-Position Gas Piston System, Flip-up Adjustable Iron Sights, Swiss Side-folding Stock with Removable Cheek Riser. Accepts -U.S. P.A.L.M. Magazines


SIG556xi

-Caliber: 300 Blackout
-Action Type: Semi-Auto
-Operating System: Adjustable 3-position gas piston system
-Trigger Pull: 7 lbs
-Trigger Type: MIL-SPEC
-Overall Length (Extended): 35.1”
-Overall Length (Folded): 26.0”
-Barrel Length: 16.0”
-Rifling: 1:7
-Number of grooves: 4
-Weight w/out Mag: 7.5 lbs
-Mag Capacity 30 Rounds
-Mag Type: Aluminum GI
-Accessory Rail Optional – 2”, 4”, 6” 1913 rail sections
-Features: Adjustable 3-position gas piston system,, flip-up adjustable iron sights, Swiss side folding stock with removable cheek riser.


See more at www.sigsauer.com.

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