Rimfires
Numrich got the NOS Marlin 25M 15-round mags that Marlin had been sitting on...
(CT magazine limit laws & all that...)
All you need to do to make them work in a 922M,
is to Mill the mag catch hole to match your regular 922M mag.
That's it.
Long story short, Marlin CT couldn't sell 'em due to...