Fishhawk,
It's just what FX seems to do. I never knew of a 25-round re-design until seen on this forum. Was lost as to the reason for the mis-feeds with my FX .25 M3, but FX-USA, upon notification, gladly sent a 25-round re-design, under warranty, after receiving copy of original receipt. According to what I've read on this forum, FX will replace any mis-feeding 28-round .25 magazines, with the 25-round re-designs, but won't replace 28-rounders that are functioning. Use your 25-rounder until if, or when, you ever come up against the problem that caused a further re-design to a 23-rounder, then contact FX-USA. Best of Luck, WM