SIG SIG 556 Classic 16” 5.56 Semi-Auto Rifle AR Mag Compatible W/ Red Dot
SOLD FOR: $1,750.00
LSB#: LSB260113JS037
Make: Sig Sauer Inc.
Model: SIG 556 Classic
Serial Number: JT 002608
Year of Manufacture: Modern
Caliber: 5.56 / .223
Action Type: Semi-Automatic, Short Stroke Gas System, fed by detachable AR15 pattern magazines with folding stock.
Markings: The left side of the receiver is marked “JT 002608”, “SIG556, 5.56 NATO, SIG SAUER INC., EXETER, NH, USA”, and “S” and “F”. The left side of the pistol grip is marked “SIG SAUER”. The left side of the buttstock is marked, “SIG SAUER”. The rear sight is marked “SIG SAUER”. The stock is marked “SIG SAUER”. The red dot is marked “SIG SAUER STS-081”
Barrel Length: 16”. 17.5” with A2 flash hider
Sights / Optics: The front sight is a hooded post sight. The rear sight is a Sig Sauer Rotary Diopter Sight attached to the 8” picatinny rail mounted to the upper receiver. This rifle kit also includes a Sig STS-081 Mini Red dot sight. The sight picture is clear and the covered turrets adjust with positive clicks. At the time of inspection the battery was dead. Overall the red dot appears in Very Good condition.
Stock Configuration & Condition: The furniture set on this rifle includes a 10” polymer ribbed clamshell handguard, a Sig pistol grip with storage, and a Sig folding adjustable stock with rubber butt pad. The length of pull can be adjusted from 11.75” when fully collapsed to 13.25” at full extension. The furniture set shows handling with no notable marks or marrs. The butt pad shows no wear and the stock functions correctly. Overall the furniture set is in Excellent+-Like New condition.
Magazine Quantity & Condition: None.
Type of Finish: Black
Finish Originality: Original
Bore Condition: The bore is bright and the rifling is sharp. There is no erosion in the bore. The inside of the action shows some very minor fouling and the side of the receiver shows some minor brass marks from use. In this writer’s opinion the bore rates 9.75/10.
Overall Condition: This rifle retains about 98% of its metal finish. The most notable marks are the series of brass marks near the ejection port. The rest of the rifle shows only very minor handling. The markings are clear, the screw heads sharp and the pins un-marred. Overall this rifle is in Excellent condition.
Mechanics: The action functions correctly. We did not fire this rifle. As with all used firearms, a thorough cleaning may be necessary to meet your maintenance requirements.
Box, Paperwork & Accessories: This rifle includes the red dot.
Our Assessment: The Sig Sauer SIG556 rifle is a semi-automatic firearm inspired by the Swiss SIG SG 550 series but designed for the American market. This particular SIG556 features a 16-inch barrel, making it compact and maneuverable while maintaining sufficient accuracy for medium-range engagements. Chambered in 5.56x45mm NATO, the rifle offers compatibility with widely available ammunition and standard AR-15 magazines, enhancing its versatility. One of its defining features is the rifle’s gas-piston operating system, derived from the SG 550 series, which provides excellent reliability by reducing fouling in the action.
Equipped with a folding and collapsible stock, the SIG556 is highly adaptable for various shooting scenarios, whether for compact storage, transportation, or adjusting to different user preferences. The included Sig red dot sight enhances quick target acquisition, making it well-suited for dynamic shooting situations such as competition or defensive use. The rifle also features a Picatinny rail for mounting optics and accessories, further increasing its customization potential. Combining Swiss-inspired precision with modern adaptability, the SIG556 offers a blend of functionality and innovation that appeals to collectors and practical shooters alike. Please see our high quality photos via the link and best of luck with your bidding!!!-R.L.