im having ftf which has grown to failer to eject i belive its in the gas tube ive field strip and have cleaned the gun several times have sprayed break clean down gas tube several times how do ya pull the gas tube any good help will be welcomed.. my m4 has became a single shot with 30 round mag
Check the gas key and make sure it is clear…
I have seen a blown primer from a bad round get stuck in the gas key and baffle the hell out of everyone… its rare, but it caused FTE really bad…
As for your FTF problem… a dirty gas tube wouldn’t cause a failure to fire, neither would a blocked gas key.
Any specifics that you can give would help… pics help a ton as well.
Factory rife or did you build it?
The devil is in the details… have you checked to make sure that your hammer spring isn’t installed upside-down? That causes FTF pretty often due to lighter than normal primer strikes.