The Prodigy Disc M4 is an extremely reliable understable midrange disc. It is designed for all players and flies extremely far for a midrange. The M4 will turn up when thrown hard and will then have an extra long glide and a soft straight finish.
The 400 G series is the regular 400 plastic with a shot of adrenaline. It is the base 400 plastic mixed with another resin that give the plastic a slightly different feel than the base 400 series. The additive also makes the disc more durable and requires more time to break it in.