Full-Length Gas Piston Operating System
Fixed Synthetic Stock
Ergonomic Polymer Forend
16" Button-Rifled Barrel
AR-Style Detachable Magazine
The SIG 556 Classic brings back the look and feel of one of the world's most sought-after military rifles in a platform built for law enforcement and responsible citizen. Featuring a full-length gas piston operating system with a 2-position gas valve, the 556 will keep operating even when the environmental conditions deteriorate. Calibered for 5.56 NATO, the Classic Compliant features an ergonomic polymer forend. The Classic's sleek profile and compact length is enhanced by a 16" button-rifled barrel. SIG Sauer shaved a pound off the Classic model by incorporating a redesigned alloy trigger housing. The Compliant variant features a fixed stock and a 10-round magazine.