I like to sparingly use oil inside the receivers of my AK's --- lubing the bolt and trigger group --- but I still get lube splashback from the open slot at the rear of the dust cover onto my safety glasses; every time I fire the gun. I shoot the 7.62x39 and the corrosive Russian 5.45x39. Is it okay to run my AK receivers free of oil, or is there some kind of washer or plug that I can block that open slot in the rear of the dustcover?
Thanks,
Erno