SIG Sauer 556 SWAT Patrol 5.56mm NATO Semi-Automatic Rifle – FDE Finish, Quad-Rail, 16" CHF Barrel
This discontinued SIG Sauer 556 SWAT Patrol pairs the proven Swiss-derived short-stroke gas piston system with a limited-production Flat Dark Earth finish across its metal and polymer components. An early JS-prefix serial number suggests Swiss-made internal parts, adding collector appeal. The rifle ships with a factory SIG Grip-Light foregrip/flashlight and three 30-round magazines, making it a feature-rich package for enthusiasts who value both function and rarity.
Condition
Overall Condition: Good condition, showing some signs of prior use and handling.
Bore Condition: Excellent – Clean, mirror finish, no signs of wear.
Rifling Condition: Excellent – Sharp lands and grooves.
Specific Condition Notes: Light handling marks are visible on exterior surfaces, and installing the included Grip-Light may require minor gunsmithing.
What’s Included
- SIG Sauer Grip-Light vertical foregrip with integrated LED flashlight (rail mount)
- 2 × SIG Sauer 30-round steel STANAG magazines with magazine coupler
- 1 × Mission First Tactical 30-round polymer STANAG magazine
The 556 SWAT Patrol operates on a two-position adjustable gas piston, drawing lineage from the renowned Swiss SG 550 series. This design keeps fouling away from the receiver and offers reliable cycling in a wide range of conditions.
Its 16-inch 4140 chrome-lined, cold-hammer-forged barrel is threaded 1/2-28 TPI and fitted with a three-prong flash hider that is ready for suppressor mounting. The 1:7 RH twist stabilizes modern 55- to 77-grain 5.56 NATO loads.
The Flat Dark Earth finish covers the carbon-steel upper, aluminum lower, and polymer furniture—an uncommon factory option discontinued in 2017. Combined with the early production serial, this gives the rifle added scarcity for collectors.
A ventilated aluminum quad-rail handguard provides ample real estate for accessories, while the left-side reciprocating charging handle, ambidextrous safety, and six-position telescoping stock support fast, adaptable handling.
The factory Grip-Light and trio of magazines complete a turn-key setup that is ready for the range or the safe.