I'm a shooter but don't know squat about working on them. I have an AK for a while now and the builder left out two round hex head screws out of the trigger guard where it bolts to the receiver. So, I have two in there and the front two of the four are missing. Said it was a cosmetic issue and not to worry. I don't like missing screws. Can anyone help me with this. The whole is threaded and if anyone can help guide me or sale me what I need i would very much appreciate it!