ProMag AR-15 5.56mm 30-Round Steel Lined Polymer Magazine with Roller Follower

Designed to deliver smooth, reliable performance under pressure, the ProMag® AR-15 5.56mm 30-Round Steel-Lined Polymer Magazine with Roller Follower features a steel-lined DuPont® Zytel™ polymer body for exceptional durability. The over-molded stamped steel feed lips offer a snug, wobble-free fit for reliable operation, while the heat-treated chrome silicon wire spring and injection-molded polymer follower eliminate binding for added reliability. Made in USA.