Derya TM22 mag issue

[u/Solariss35]

I just got a TM22 with 12" barrel, came with a 10 rd mag that feeds perfectly.

I bought a couple of the Derya 15rd mags, but it doesnt insert well at all. On inspection, there is a difference in the rear notch of the mags. Is this an issue for anyone else? I'm wondering if I should return it, or should I try sanding it. Don't want to mess it up if there's a different version of the 15rd mag I'm supposed to get.

Thanks

[u/dke783]

I had the exact same issue with several 15-rd mags I bought in May.

Is not the notch that is the TM22 fitment problem. It is the front-to-back length of the magazine... It is about ~0.5mm too big for the TM22 magazine well. ​

What u/Status_Ticket5044 describes is what worked for me: use emery or other sanding means to remove about 0.25mm thickness from the front of the magazine, and do the same for the back of the magazine. Perhaps 0.5mm total reduction in the front-to-back girth of the magazine,​and now these mags slide nicely. ​

[u/Solariss35 → u/dke783]

Thanks!