30-Round, 5.56 NATO/.223 Rem. magazine fits Ruger® SR-556®, AR-556® and other AR-style firearms. Manufactured in the USA by C Products Defense, this improved design features a Stainless Steel, two-part body that is robotically welded to control critical-to-function dimensions to ensure proper mag well fit. Each magazine is coated in black Teflon® for corrosion resistance and enhanced durability while the stainless steel spring and orange, anti-tilt follower are designed specifically for increased feeding reliability. C Products Defense stands by their magazines with a 100% replacement guarantee.