Click here to download the catalog as a PDF file. To view this site you need Adobe Flash Player and your browser must allow javaScripts. Go here to get the latest Flash Player. ® Exceptional Performance and Reliability! Ambidextrous safety Mini Red Dot Sight included Rigid steel receiver Ergonomic design for balance Full length gas piston 30-round AR integrated connecting polymer magazines The SIG 556 rifle delivers unmatched reliability with virtually no cleaning or maintenance. At the very core of SIG 556 is a stainless steel upper housing that completely encloses a hardened steel monoblock. Threaded to a cold hammer forged barrel, this unique design provides an ultra rigid platform delivering unparalleled accuracy and performance. Gas volume is regulated by a two position valve that practically eliminates carbon build-up and firing residue, insuring reliable function under the most extreme conditions. 2 position gas valve Folding buttstock for portability and concealability Cold hammer forged barrel ® Circle No. 223 on Inquiry Card Fo r m o re i n f o rm a t i o n v i s i t s i g s a u e r. c o m