Federal is excited to bring to market a line of linked ammunition for all you collectors and hard core shooting enthusiasts. This is new production ammo that comes linked for use with an M2A1. The ratio of the rounds is 4:1 M33 Ball and M17 Tracer. For all of you who aren’t as savvy with mil-spec speak that corresponds to 4 rounds of 661 Grain Full Metal Jacket (M33) to ever one round of 618 Grain Tracer (M17). The ammo comes standard in a military metal ammo can with a total of 100 rounds per ammo can.