M14 not cycling

simpleton

simpleton

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Red Deer, AB
I've got a couple of M14's, one is fine, the other I've just shot for the first time today. I cannot get the damn thing to cycle rounds. I had shimmed the gas system, and it would not eject a round. I removed the shims, and it ejects a round, but there is not enough travel to snag another round into the chamber. I've checked everything over twice (including the gas valve......smart asses). I don't think it's getting enough gas. I was shooting 150gr Winchester, so that shouldn't be a problem.


Any input guys? :redface:
 
Take both of them apart and check the size of the gas hole in the barrel and see if they are the same. Can't remember the drill size. Check the op rod , guide and the spring is binding or too strong or odd. Could also be a bad chamber that causes the cases to stick. Had that problem once.

Just a few thoughts, I'm sure the others have more info.
 
It sounds like the gas hole in the barrel and in the gas cylinder are not lined up properly. Shimming off-sets it even more so that no gas gets into the gas cylinder. Rack the oprod back and lock it in the open position. Use a 1/16 drill bit and check that there is a complete path from the bottom of the gas cylinder all the way into the barrel. Tilt the barrel up so that the piston is out of the way. You should see the drill bit protrude right into the barrel. If this is the problem, you may have to machine the back of the gas cylinder to make it line up properly. Kind of the reverse of putting shims in. Good luck!
 
yup..... very often i find.... shims are not the answer to tightening up the norc gas system. I avoid shims as a matter of course BUT they are at times the only viable solution.
I would agree that you have shimmed enough to close off or impede your gas port alignment between the barrel and gas cylinder.

solution 1 : remove shims..... remove flash hider... remove gas lock ring and flip over and re install. It may just tighten up perfect and you are good to go with no shims.

solution 2 : have your barrel band welded to the gas assembly to negate movement.

i do not recomend any machining of the gas cylinder body to correct a loose gas system. Hand fitting the gas lock on flat steel surface using valve grinding compound is what i recomend. This combined with shims if needed as well as unitizing (welding) are the three methods i practice.
 
Thanks guys, I'll have to take a closer look. I'm know I'm not getting gas flow, so I'll look at those things mentioned.


.......It just sucks I have to wait 2 weeks until I get home again! :redface:
 
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