9mm mag block for 5.56 lower....which one?

[DucatiRon]

Failure to feed or failure as in destruction of the part itself?

Quite honestly I have seen more budget 9mm carbine/pistol builds with major feeding and extraction issues then anything else in the AR world with the net with the exception of the very pricey CMMG rifles and those offered by Wilson. A much as I love PSA their 9mm platforms are very hit and miss. The only good thing about them when you get a miss is the life time warranty.

It bends the ejector and will not eject or feed. Jams the gun.

Added a video link of the failure.

https://www.youtube.com/watch?v=L0lmtUDrKXQ&t=17s


Key word there is BUDGET. Cheap shit rarely works.

I've got 1k in my total gun. Runs flawlessly even after 10k round count.