ok so I got the replacement mag from diamond back they replaced the c-mag with a pmag and its way better no issues the weapon is finally acting right lol so relieved also don't think it liked the armscorp and Remington ammo I was using the pmag cycled them both fine but I did have a few hangfires with the armscorp and one failure too eject so who knows the round may just be a trouble maker in these rifles only time and experimenting will tell
