SIG Sauer SIG 556 Classic SWAT 5.56 NATO, 16-inch, Folding Stock, Diopter Sights, Quad-Rail — U.S. Border Patrol "STATION ONE" Marked
This SIG Sauer SIG 556 Classic SWAT stands out with U.S. Border Patrol "STATION ONE" markings on the right side of the lower receiver and an Exeter, NH rollmark indicating production prior to the 2016 change to Newington, NH. It features a short-stroke gas piston system, a 16-inch threaded barrel with an A2 birdcage flash hider, and the Classic SWAT configuration with a side-folding triangular stock and aluminum quad-rail handguard. The bore is excellent with sharp rifling, and the rifle retains its SIG rotary diopter rear sight and fixed front post.
Condition
Overall Condition: Good condition, showing some signs of prior use and handling.
Bore Condition: Excellent - Clean, mirror finish, no signs of wear.
Bore Rifling: Excellent Rifling - Sharp lands and grooves.
Specific Condition Notes: Light handling marks from prior use are present. The bore is bright and clean.
What’s Included
- SIG SAUER SIG556 owner's manual
- 1 x 30-round Magpul PMAG GEN M3 polymer AR/M4-pattern magazine with custom artwork
The Classic SWAT configuration pairs an aluminum quad-rail handguard with a side-folding triangular polymer stock, delivering a compact profile and robust accessory mounting real estate. The SIG SAUER polymer pistol grip with palm-swell ribs adds secure, comfortable control.
This rifle uses a short-stroke gas piston with a rotating bolt and a right-side reciprocating charging handle with bolt hold-open. Controls include a push-button magazine release and a 2-position manual safety. It accepts STANAG/AR-pattern magazines and is listed with a 30+1 capacity.
Its 16-inch barrel is threaded and fitted with an A2 birdcage flash hider. Sighting is handled by a fixed front post on the gas block with protective ears and a SIG rotary diopter rear sight with a visible "100" index. A front sling ring is present, and a scope mount is installed.
The receiver set combines a stamped steel upper and an aluminum lower, with markings reading "SIG 556 5.56 NATO, SIG SAUER INC., EXETER, NH, USA." The Exeter, NH rollmark places production prior to SIG's 2016 marking change, and the rifle is noted as made in the USA.
Distinctive customization includes a U.S. Border Patrol circular emblem and the "STATION ONE" text on the right side of the lower receiver. The package includes a SIG SAUER SIG556 manual and a Magpul PMAG GEN M3 magazine featuring custom artwork.