Just throwing this out there, but is it the bolt carrier that stops midway on the rails? Do you then push the charging handle forward and it feeds correctly, or does it jam that you have to clear it, eject the round?
Additionally, what ammo were you using, hollow points or soft points can be a big problem with some AKs.
Do not start dremeling anything just yet.
Here's an interesting thread that recently popped up that might
help you in possibly IDing the issue, as in the mag is sitting too low. Also some good pics for reference.
"If the American people ever allow private banks to control the issue of their currency, first by inflation, then by deflation, the banks & corporations that will grow up around them will deprive the people of all property until their children wake up homeless on the continent their Fathers conquered. The issuing power should be taken from the banks and restored to the people, to whom it properly belongs."
KrisAnne Hall on Oregon
"I am sullied - no more" Col. Ted Westhusing