Any one tried this Mag loader. One thumb get it done

[Jeb Stuart]

Seems like it would be nice to have a easy universal mag loader with you all the time. Put on key ring, easy to carry etc.

 

[Fine Figure of a Man]

 

[GunnyUSMC]

I've seen those before. They work ok. The problem id when the the part that pusses the cartridge down into the mag slips to the side of the cartridge. But with a little practice it should work just fine.
The problem with putting one on a key ring would be getting your thumb in it. You would have to remove it from your key ring.