Prodigy Discs says this about the M5: The M5 is the least stable of the Prodigy Mid Range discs to date. This is a great all round disc for highly skilled players and for people just learning the game. This disc will flip up when thrown hard and turn right.
About 300 Series Plastic
The 300 Series is a special blend of materials that is durable enough to take solid impact but has the ability to be broken in over time.