Hey everyone. First time posting on the forum. I recently got a new JG RPK EBB and it had a loose outer barrel (it rotates). It is not bothering me too much until I noticed it was causing the front iron sight to rotate as well along with the outer barrel. I looked underneath to see if I could tighten the screws like I have done on some SRC AKs but this RPK had these wierd looking screws that I dont think are designed to be removed. Anyone know what these are called and how to remove them? I thought I could use a rotary tool to make an incision and use a flathead to take them out, but thought I could first get some info on what the heck these are. I know it looks like I could take them out using a flathead as it but trust me, I cant.