I have Black, FDE, and Foliage Pmags...numbering them within their color genres within 30 and 20 rounders. Have around 50 Pmags now and just decided to number them this way.
The K is the first letter of my last name! They are just both the first mags in their series (#1). Didn't think about putting numerous mags in the photos...
Have not tried stamping the bodies yet but I am bracing the floor plates on some steel bar stock.
Also did the floor plates on all my Glocks.
I used 1/8" on the Pmags and 1/4" on the Glock mags...can post some pics of those tomorrow.