A clear window on the side of the magazine provides the operator with a visual indicator of the number of remaining rounds A white full mag indicator on the bottom of the magazine pops out providing a tactile indicator during low light or night conditions Polymer body reduces noise High impact polymer 30 round .223 magazine Non-tilting follower Interior of magazine is perfectly formed to the shape of the round preventing jams and misfeeds Counting system does not interfere with disassembly or reduce capacity