New SIG 556 Rifle: The time Has Come
SIG SAUER® introduces U.S. made version or legendary Swiss rifle.

EXETER, NH – No other semi-automatic rifle has captured the imagination of the shooting public like the SG 550 series rifle. For years this legendary Swiss made rifle has been restricted to law enforcement and military sales where it has continuously built on its reputation for outstanding performance, accuracy and durability. Now, SIG SAUER® has announced that the time has come for a U.S. made version and introduces the new SIG556.

The SIG556 features the same high-performance two position adjustable gas piston operating rod system, engineered by SIG’s sister company Swiss Arms, and marries it to a trigger housing that not only cuts the rifle’s weight by a pound, but is designed to accept standard AR magazines.

Originally developed to work under the extreme situational pressures and environmental conditions of the Swiss Army on alpine duty, the new SIG556 delivers when it counts regardless of ammunition type and variances in gas pressure or case material.

The SIG556 features a 16” military grade cold hammer forged barrel with a twist rate of 1 in 7”. The barrel also features a nitride finish for long-term durability and corrosion resistance.  

The forearm housing the gas operating system is a vented non-slip polymer featuring the SIG TriRail design with three integrated Picatinny rails for mounting accessories. There is a forward mount for right or left side sling attachment.

The Picatinny rail equipped receiver is made of high strength carbon steel with a durable wear-resistant phosphate finish. The trigger housing is made from a heat treated aircraft grade aluminum alloy with a hard-coat anodized finish designed to survive extreme conditions. The rifle comes equipped with a smooth two-stage trigger.

The SIG556 also features an ambidextrous safety and is designed to accept standard AR magazines. A 30-round magazine is supplied with each rifle.

Spare battery compartments are provided in the ergonomically designed pistol grip as well as the rubber padded watertight adjustable butt stock. The butt stock also offers sling attachment points.

In addition to the standard model SIG556, which began shipping in December 2006, SIG SAUER® will also offer the SIG556 SWAT. The SWAT model will feature the same compact design of the standard SIG556 with 16” barrel, but will feature a flat top Picatinny railed receiver and a tactical quad rail outfitted with a SIG SAUER® Grip-Lite vertical fore-grip complete with tactical flashlight.

SIG 556 Specifications & Features