I'm having an issue with my M57 where empty casings will get stuck inside of the chamber after they've been extracted if they're reinserted. It doesn't happen often, but sometimes if i need to clear a jam the casing may end up being re-chambered and will then get stuck. When this happens, the slide will be locked forward or slightly back, and can't be opened. The only way to clear the jam is to forcibly break apart the gun and clear the casing with a rod. I attached a picture of a partially removed casing inside of the barrel. I'll add that the ammo i'm using is czech surplus SMG ammo


















































