ProMag 5 Round .223 Rem/5.56 AR-15 Magazine, Black – RM5

ProMag's Rollermag reinvents the wheel by adding them to an anti-tilt follower, in a Technapolymer magazine body. Experience a smooth, anti-tilt rolling feed with the revolutionary RollerFollower for maximum friction reduction. The magazine is built with ProMag's anti-fatigue chrome silicon springs, so you can keep them loaded and stashed for up to six years without worry. This model has a black finish and a 5-round 223 Rem/5.56 NATO capacity.
ProMag magazines are designed utilizing modern precision injection molding of Mil-Spec polymer compounds. Every ProMag magazine is backed by a lifetime guarantee against manufacturer's defects.

Features:

Magazine body constructed of a proprietary DuPont Zytel based polymer
Patented anti-tilt Roller follower
Magazine spring formed from heat treated chrome silicone wire
Made in USA