Sig Sauer P556, 5.56×45 NATO 10” Barrel Semi-Auto Pistol & Mag, Red Dot
SOLD FOR: $1,725.00
LSB#: LSB260405TT004
Make: Sig Sauer
Model: P556
Serial Number: TQ 001488
Year of Manufacture: Modern
Caliber: 5.56×45 NATO
Action Type: Semi-Auto Long Stroke Piston Operated Pistol Fed By Detachable Magazines.
Markings: The left side of the receiver is marked, “P556, 5.56 NATO, SIG SAUER, EXETER, NH / PISTOL USE ONLY / TQ 001488”.
Barrel Length: 10”
Sights / Optics: The front sight is a hooded post dovetailed to the gas block. The rear sight is a folding adjustable peep sight integral to the receiver rail. The top of the receiver has a picatinny rail with a Sig red dot affixed to it. The optic is in Very Good condition, though its adjustment dial caps are missing
Stock Configuration & Condition: This pistol comes with a two-pice polymer set with a vented handguard w/ picatinny rail section and ribbed pistol grip. There is a light attached to the handguard rail. There are light handling marks throughout. There are no chips or cracks. Overall, the grip & handguard are in Excellent condition.
Magazine Quantity & Condition: This pistol includes its one 20rd Magpul magazine, the magazine is in Excellent condition.
Type of Finish: Black Nitride
Finish Originality: Original
Bore Condition: The bore is bright, and the rifling is sharp. There is no erosion in the bore. In this writer’s opinion, the bore rates 9.75/10.
Overall Condition: This pistol retains about 97% of its original metal finish. The receiver behind the ejection port has finish wear. There are light scratches and handling marks throughout. The screw heads are sharp. The pins are unmarred. The markings are clear and legible. Overall, this pistol rates in Very Good + 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: 1x Magazine.
Our Assessment: The SIG Sauer P556 is the compact pistol variant of the SIG 556 rifle platform, itself derived from the legendary Swiss SG 550 series of military rifles. Unlike conventional AR-pattern pistols, the P556 utilizes a long-stroke gas piston operating system renowned for reliability and durability under adverse conditions. Chambered in 5.56×45 NATO, one of the most widely used military rifle cartridges in the world, the P556 delivers rifle-caliber performance in a compact package while retaining many of the design characteristics that made the Swiss SIG rifle family so highly respected. This example remains in very good plus overall condition, retaining approximately 97% of its original finish with only moderate finish wear visible behind the ejection port and minor handling marks throughout. The bore remains exceptional, showing bright surfaces and sharp rifling with no visible erosion, supporting its impressive 9.75 out of 10 rating. The polymer handguard and grip remain in excellent condition, while the included SIG red dot optic provides a practical aiming solution. The optic remains functional but is missing its adjustment dial caps. The pistol also includes a Magpul 20-round magazine and a weapon-mounted light attached to the handguard rail.
Altogether, this SIG Sauer P556 represents a desirable example of one of the more distinctive rifle-caliber pistols produced during the modern sporting firearms era. Its Swiss-inspired operating system, compact dimensions, and piston-driven design separate it from the majority of AR-pattern pistols on the market. Combining excellent mechanical condition, desirable accessories, and the proven SIG operating system, this P556 remains an appealing option for collectors and enthusiasts seeking a compact firearm with strong ties to the famous SG 550 family of rifles. -R.E.