SIG Sauer Sig 556 Classic


The Sig Sauer Sig 556 Classic is a semi-automatic tactical carbine chambered in 5.56 NATO. The Classic is the standard 556 model, which is a modified version of the Sig SG 550/551, a popular assault rifle used by US and allied forces. The biggest difference between the two, the 556 is only semi-auto.

The Classic has a gas piston operating system, which functions by propellant gases entering a port near the muzzle, the gas enters a tube that’s directed onto a piston and the piston connects with the bolt and pushes it rearward.

The Classic’s features include a cold hammer forged barrel, so a machine carefully cut the grooves in the bore. This process provides durable rifling. The Classic’s stock is collapsible for storage, but also adjustable for length. It has a polymer fore-end with a short Picatinny rail running along the top and bottom for easy mounting of optics or accessories. It has a rotary diopter rear sight, which provides four sight stations: CQB, 100m, 200m and 300m. It is also adjustable for elevation and windage.

Sig Sauer recommends the Classic for law enforcement and responsible civilians.

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Sig 556 Classic
Caliber: 5.56 NATO
Capacity: 30
Sights: Rotary diopter sight
Features: Piston driven operating system; cold hammer forged barrel; alloy trigger housing; flash suppressor; and lower Picatinny rail
Action: Semi-auto
Stock: Polymer folding telescoping stock
Material/Finish: Aluminum lower receiver<br />Steel/matte black
Scope: Picatinny rail
Website: http://www.sigsauer.…
Weight: 8.2 pounds
Barrel Length: 16"
Twist: 1 in 7"
Overall Length: 27.1 to 36.1"

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