FAB Defense magazine problem

[u/Over_Independent8887]

I have those magazines but for some reason something is wrong and they just don’t work in any 5.56 rifle I tried.

The bolt just gets stuck on lips somehow and doesn’t even touch the round to feed.

I would appreciate if anyone could share their experience. I am sure they are good brand and should work :)

Thanks !

[u/CAFirearmSociety]

If you want 10 rounds then just go with steel/aluminum mags, they usually work much better. With polymer grab pmags, they are cheap and work.