The New M1 from Prodigy Disc was PDGA Approved on July 4, 2015. The New M1 was the last disc to be approved 30 days in advance of Pro Worlds to allow it to be used during singles play that officially starts Aug 4th.
“The original M1 has been redesigned, based on Team Prodigy player feedback. This revised New M1 model is considerably more stable and holds the line of release much tighter than the original M1. This midrange flies with incredible consistency and control and is good for all wind conditions. Like the X1 and the H1, not even the stiffest winds can cause this disc to flip. Look the wind in the eye, and throw with confidence.” – by Prodigy Disc