Utilizing new material technology and manufacturing processes for enhanced strength, durability, and reliability to exceed demanding military performance specifications.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.Features dual-side windows with numerical markers, high visibility coil on the spring, next generation long glass fiber polymer, enhanced strength & durability, ribbed front and rear gripping surface, tool-less disassembly with double floor plate safety release tabs, long-life usgi-spec stainless steel spring, four-way anti-tilt self-lubricating follower, flared floor plate, oversized bolt catch and paint pen dot matrix.Capacity: 30rdModel: Extreme DutyModel Fit: AR-15, M4Capacity: 30