Originally posted by Yellow Dog: They added the "P" when they went to CNC equipment to duplicate the risers the same, time after time in 2002. Prior to 2002 they were done by hand. CNC stands for "Computer Numerical Control". You can input offsets into the lathe and reproduce riser after riser to the same dimensions. The "P" bows have "Precision Crafted" on them vs "Hand Crafted" prior to CNC. The "P" signifies Precision and not Phenolic. Hope this helps.