SureFire MAG5-100 100rd Magazine (5.56x45 NATO)
The 100 round magazine by SureFire offers efficiency and volume. For those looking for typical 30 round magazines, this is not what you're looking for. For those shooters who require high volumes and/or suppressive fire, this is a preferred pick. The MAG5-100 offers a lightweight chassis, ease of use, and it keeps the bulk of the magazine evenly balanced below the action, which some may find easier to use than drum-style magazines.