picked mine up yesterday,got home,took it all apart, did the usual polish job and replaced the original connector with a 3lb connector,put it all back together.grabbed a bucket of remington golden bullet .22lr and went out back to my range and proceded to fire 300 plus rounds as fast as ican and it ran great , not one hiccup,after that i tried a couple of my advantage arms magazines and they run just fine , no feed issues and slide locked back