Model 556 Semi Automatic Rifles    
	
The Sig 556 features the same high performance two position adjustable gas
piston operating rod system engineered by Sigs sister company Swiss Arms
and marries it to a trigger housing that not only cuts the rifles weight by
a pound but is designed to accept standard AR magazines. The Picatinny rail
equipped receiver is made of high strength carbon steel with a durable wear
resistant Nitron X rifle finish. The rifle comes equipped with a smooth two
stage trigger. A 30 round magazine is supplied with each rifle.