Sig Sauer SIG556R 7.62x39 Semi-Auto Rifle, 16 inch Barrel, Adjustable Gas Piston, Side-Folding Stock, AK-Mag Compatible
The Sig Sauer SIG556R stands out for its 7.62x39 chambering paired with AK-pattern magazine compatibility and a piston-driven operating system. This example is in excellent condition and comes outfitted with a full-length receiver Picatinny rail, an adjustable gas valve, and a side-folding skeletonized polymer stock. A SigTac red dot sight is mounted, and two 30-round magazines are included.
Condition
Overall Condition: Excellent condition, showing only faint signs of any prior use or handling.
Bore Condition: Excellent - Clean, mirror finish, no signs of wear.
Bore Rifling: Excellent Rifling - Sharp lands and grooves.
Specific Condition Notes: There are scratches to the finish on the right side.
What's Included
- SigTac red dot sight with honeycomb ARD installed (mounted on the receiver Picatinny rail)
- Two 30-round AK-pattern polymer magazines (waffle pattern)
The SIG556R combines a 7.62x39 chambering with detachable AK-pattern magazine compatibility. Its gas-piston, rotating-bolt action features an adjustable gas valve for tuning the system to the rifle and conditions.
The 16-inch barrel uses a 1:9.5 RH twist and a threaded muzzle fitted with an A2-style birdcage flash suppressor. The barrel configuration supports common 7.62x39 loads while keeping overall length compact.
Controls include a right-side reciprocating charging handle and a manual rotary safety lever, along with a two-stage trigger. The rifle ejects to the right through a dedicated ejection port.
Furniture is polymer throughout, with a handguard that has elongated cooling slots and accessory rail sections at 3 and 6 o'clock. A full-length Picatinny rail sits atop the receiver. The side-folding, skeletonized polymer stock provides a 13.5-inch length of pull, with factory OAL measuring approximately 35.9 inches extended and 26.0 inches folded.
Markings reflect U.S. manufacture in Exeter, New Hampshire. This rifle also includes a SigTac red dot sight mounted on the receiver rail and ships with two 30-round AK-pattern polymer magazines.