On an open-bolt machine gun it's impossible for a cook-off to cause a runaway gun.
True, but a worn sear, or bolt notch (or whatever parts perform that function) absolutely WILL!
On an open-bolt machine gun it's impossible for a cook-off to cause a runaway gun.
Ha, don't I know it! From what I could tell, there was no parts replacement schedule for our M240s: The armorers just waited for us to break them and then they fixed them. The '240 is built like a tank, but eventually the sear would wear down and wouldn't catch the bolt, resulting in a runaway gun. I learned really quickly to not link too much ammo together unless you're prepared to induce a stoppage. I also learned that the feeding mechanism was so strong that pulling on the belt was useless and wouldn't cause a stoppage; to stop it you had to twist the belt 90 degrees which either jammed it up and kept it from feeding or just broke the belt entirely.44 AMP said:True, but a worn sear, or bolt notch (or whatever parts perform that function) absolutely WILL!Theohazard said:On an open-bolt machine gun it's impossible for a cook-off to cause a runaway gun.
My take on this, and I could be wrong. I believe that you may have accidentally done a third tap without realizing it. The third round was loaded wrong or cheap/bad primers. Thereby causing a hang fire. This is especially likely if the trigger pull is very light and short. Is this a possibility?