Now In Stock!. New Price Of Only $1549.95 New Sig 556 Classic Rifle WIth 16" Barrel, Mini Red Dot Optic, CollapsIble & Folding Stock. The SIG556® Classic carries a tactical heritage that has served special operations groups, law enforcement agencies, and counter terrorism units throughout the world. When assignments depend on exceptional performance and reliability, tactical operators depend on SIG SAUER® rifles. New for this year is the introduction of the SIG556 Classic model. The Classic name is based on the rifles Swiss heritage and the classic features that it draws from those world famous Swiss rifles. The adjustable stock snaps and securely locks into a folded position with a length-of-pull that can be preset by the user. The clean tapered forend styling allows for a firmer grip and better control. The redesigned trigger housing improves access to functional controls while improving the overall ergonomics of the rifle. The SIG556 operating system is topped off with a red dot sighting system that ensures quick target acquisition. The Classic SIG556 rifle is also available with the diopter sighting system. The new rear rotary diopter sight, utilizes aperture calibrations from close quarter ranges out to 100m, 200m, and 300m.