Can anyone here offer some advice as to the jams with my sons new AK. It's a WASR3 in 5.56..It was purchased new, in the box from a reputable dealer.It's been cleaned, cleaned, and then cleaned again with little success.Gas ports are all clear, piston is clean, operating rod is not bent etc. The jams he is experiencing are not your typical mag jams.. The spent round will not come out of the chamber, and the next round is hitting the base of the spent round. We cleaned out the chamber using a piece of scotch brite pad on the end of a rod, chucked that up in a drill, and cleaned with carb cleaner.It seemed to fire ok, but we took it out again today and it was a great single-shot again. We were using Wolf .223Rem, steel-case.. before someone tells us to use 5.56, we tried that also. It was worse with the American Eagle brass 5.56. It's back at the gunsmiths right now, and the smith said if he can't get it to go, he's going to send it back to Century.. The extracor is also working correctly, no burrs or junk under it. My son is so disappointed in this rifle he doesn't want to continue with this hobby. He's tired of all the problems.. Any help is appreciated.