So I am helping my friend fix his SLG. At first the thing would turn on but not shoot so I looked at the manual and the troubleshooting said to take bolt out and lube it. I did that, It then shot. Every 10-15 shots the bolt gets stuck forward and leaks horribly out the barrel. So I pressed the degas button, It shot 10-15 more shots then the bolt got stuck again.
Help?!? Any suggestions?
UPDATE 6/24: AS OF NOW PROBLEM IS SOLVED. THANKS FOR THE ADVICE/INFO