EQUALIZER - Nerf Half-Dart Mag (LYNX COMPATIBLE)

I loved the idea of this magazine, and have printed a couple of them now. They fit well in my Gryphon, SPAMF, Caliburn, and probably a Talonclaw. There is one problem, though... It does not fit in my Lynx. Apparently, the feeding lips' square-ish outer shape hits something inside the stock piece, and it does not seat all the way. You can put it in, but not operate the pump grip. This is a problem with the m2.2 Metric version, I don't know about the newest versions.

To fix it, I simply cut off the outer edge of the feeding lips. Now it should work. I've tried with one, but I'm printing more to properly test it.
I've included all 3 lengths of magazine back pieces.

This is a remix from https://www.thingiverse.com/thing:398515