The latch fits under the "shark fin" on the back of the Tok mag. You don't need the typical AR slot in the mag, but you should open up the feed lips a bit to clear the bolt and size the mag up if its too fat / thin / curved. We just had a run on flush mounts so I need to see what I have here and back at the work bench.
Its been a long time since I've updated this page..... I just finished testing our new AR Pistol Mag for the Tokarev round. Bench testing went great at 100% cycle. Live fire, unfortunately, like the TCM is giving us nose high jams. We made a big change from our original Plan B design as our body feed lips are not the best design for that approach. But the rounds fed great...…. So, we went back to Plan A and working through the bugs on that. Hopefully I'm over thinking things again and just need to make the cuts and rack some shells it.
And to make matters worse, I've got a box of brass and can't find my dies...… I was hoping not to run all that surplus crap through the brand new upper, but sometimes ya have to dance with the one ya got.