With the Straight-line, Single Stack configuration, I have only seen a few 15 round SIG Mags being the max (After the SIGPower Mod)
I?ve always wondered if the SIGPower Mod would work on the Witness 22 Mags
Problem is, once you?ve stacked a few more in, they start to become more of a ?Banana? shape, and start to bind-up inside the Tube, because of the stacking of the Rim
The HiCap mods for the Kadet, I have seen, don?t seem very cost affective, IMO