The ProMag AR 556MM Roller Follower 10RD Magazine is compatible with the AR-15 platform and features a unique roller follower to minimize friction during operation. This magazine holds 10 rounds and is designed for .223 Rem/5.56 NATO cartridges.Key FeaturesRoller Follower: The magazine includes an anti-tilt roller follower that enhances reliability by reducing friction.Capacity: This magazine has a 10-round capacity, suitable for various shooting applications.Color: Finished in a sleek black color for a tactical look.