Make: Sig Sauer Inc.
Model: SIG 556R
Serial Number: 28A001203
Year of Manufacture: Ca. 2011
Caliber: 7.62x39
Action Type: Semi-Automatic, Adjustable Short Stroke Gas Piston Operated, AK magazine compatible.
Markings: The left side of the receiver is marked "28A001203", "SIG556R, 7.62X39, SIG SAUER INC., EXETER, NH, USA", and "S" and "F". The right side of the receiver is marked "S" and "F" near the ambidextrous safety. The left side of the pistol grip is marked "SIG SAUER". The barrel is marked "7.62X39mm 1/9.5".The stock is marked "SIG SAUER".
Barrel Length: 16", 17.5" with A2 flash hider.
Sights / Optics: The gas block has a dovetail currently filled with a blank. The top of the receiver has an 8" picatinny rail for the mounting of sights and optics. The picatinny rail has a flip up aperture rear sight that folds out of the picatinny rail, adjustable for elevation.
Stock Configuration & Condition: The furniture set includes a 10" synthetic forend, pistol grip, and folding three-position telescoping stock with rubber butt pad. The LOP at full extension is 13.25". The furniture shows minor surface level marks from storage and minimal handling. Overall the furniture is in Excellent condition.
Type of Finish: Black Phosphate and Anodize
Finish Originality: Original
Bore Condition: The bore is mostly bright and the rifling is sharp. There is no erosion in the bore, but there is some minor fouling in the grooves. In this writer's opinion the bore rates 9.5/10.
Overall Condition: This rifle retains about 98% of its metal finish. The balance of the finish shows minor wear behind the ejection port and some rub wear in the magazine well. The action shows light operational wear. The pins are unmarred. The markings are clear. Overall, this rifle rates in about 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 a blue plastic Sig Sauer case with a total of 5 magazines. Two Magpul magazines are new in packaging, one 30 round and two 40 round Bulgarian magazines.
Our Assessment: The SIG Sauer SIG 556R is a unique and highly capable rifle that blends Western design precision with the rugged, proven power of the 7.62x39mm cartridge. Built on SIG's 556 platform and adapted for AK-47 magazine compatibility, the 556R offers exceptional reliability, improved ergonomics, and the added benefit of widely available magazines and ammunition. Its short-stroke gas piston system provides smooth cycling and reduced fouling, making it a cleaner-running rifle than traditional direct impingement systems. The folding stock, integrated picatinny rail with hidden flip-up sight, and ambidextrous controls offer modern tactical utility in a robust package.
This example is in Excellent condition, showing minimal wear with a nice bore. The rifle comes with 5 AK magazines and is ready to accept most standard AK mags. For those seeking a modern rifle that delivers the classic performance of 7.62x39 with superior build quality and modularity, the SIG 556R is an ideal platform. Whether for range fun, defensive use, or collection appeal, this rifle stands out as a refined and reliable evolution of the AK concept. Please see our photos and good luck!
