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/shredder_of_gnar]

I have the 16” variant and just purchased the 15rnd polymer mag. It barely fits in the well, is exceedingly difficult to remove, and causes feed issues with what seems like every second cartridge. I didn’t even inspect the new one against to original, but I’m assuming I’ll find the same issue…

[u/Mahatma_Ghandicap → u/shredder_of_gnar]

I have a similar issue. My 10rds are absurdly tight. My 15 and 25 round ones just drop right out...