this also sheds a little light on the topic, at least it does for me. Jim Fuller-->The vast majority of the AK community shuns from screw builds, and here's why...
First of all, Kalashnikov didn't design the rifle with screws, and there's a good reason for that. Screws can back out, adhesives can fail, and the threads on a screw could "cut" the receiver holes. But the biggest thing is that properly set rivets expand in the channel and more or less force the two matted items to be close together.
Secondly, screw builds are typically done without removing the barrel; which means that the screws don't have much "meat" to bite on.
You gotta understand that the simple inexpensive rivet is pretty much foolproof. It doesn't need to be fiddled with, and it doesn't come loose. If a screw loosened during firing, which is always a possibility, the shooter may not have the time or even know that it is happening. If the front trunnion becomes loose and the rifle is fired; bad bad things will happen.
But I'll offer this again, show me one professional AK builder that uses screws, and I'll concede your point.