The Mag are basically strat style pickups wound on Gibson style bobbins. They have no bar magnet and no keeper bar.
You mean you yanked out the rod magnets and swapped in steel slugs and hexes without a keeper bar?
I don't know anything about the Mag. Like the StagMag without the Stag?
The Mag is 14k coil, A5 poles, no stagger. StagMag is 16k coil, A2 poles, staggered. My StagMag sounds like a Distortion with coils in series (but with a bit of Brobucker/PAF mid-chime, which I think is coming from the A2 poles), a Telecaster with coils in parallel, and Strat with coils split. Very useful.
Here's a review:
http://darthphineas.com/2019/08/seym...ncan-stag-mag/