I looked at the pics. If I'm not mistaken, those would be the mag's made to New Detonics, (Phoenix, AZ), specs. They're different than the specs used by the original Seattle company, or the latest "Detonics USA" specs. The Phoenix company did away with the loaded chamber indicator, changed the follower, and used a different kind of spring. It's my understanding that the latest "Detonics USA" mags have gone back to the full size follower, which brings back the loaded chamber indicator, and uses an improved version of the Detonics style mag spring. I've heard that the latest magazines also have improved feed lips, which are said to be optimised for the CombatMaster pistols. Maybe that's why they sell for $39.95!

...Deeton