Anyone having problems inserting steel mags into new calguns lower

[GasPiston]

I recently completed a Calguns lower and noticed that i am having difficulties inserting and removing steel mags into the lower. The same steel mags work flawlessly on my other lowers. Is anyone else having this problem? How can I resolve this?

Regards,
GasPiston

[-hanko]

How do regular aluminum USGI mags fit???

That's the standard, go from there.

hth

-hanko