Mission First Tactical EXDPM556WBL Extreme Duty 30rd 223 Rem/5.56x45mm Fits AR-15/M4 Black Polymer

Durable dual-side anti-glare transparent windows with numerical markers and high viability indicator coil on the spring allow quick visual identification of the approximate number of rounds remaining. Designed for the AR15/M4 but allowing use with a wide range of non-AR15/M4 platforms.