SIG 556 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. SIG SAUER® offers the U.S. produced version as the SIG 556, which is available to the general consumer and law enforcement markets. The SIG 556 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.

Model 556 
Action Semi-automatic 
Caliber 5.56 NATO 
Barrel Length 24 inch Bull Barrel
Finish/Color Black 
Grips/Stock Magpul Stock 
Accessories 1 Mag