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Extractor failure, or dirty gas piston malfuction?

This is a discussion on Extractor failure, or dirty gas piston malfuction? within the Modern M14 forums, part of the M14 M1A Forum category; That could be your problem, how many rounds?...


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Old June 16th, 2017, 01:29 PM   #16
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That could be your problem, how many rounds?

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Old June 16th, 2017, 01:44 PM   #17
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Cylinder don't look too gummed up, but could be cleaned anyways. I meant earlier inner diameter not outer. But yeah, if your way up in rounds the bore of the gas cylinder can wear out. With carbon on the piston it can speed up the process as well.

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Old June 16th, 2017, 01:51 PM   #18
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The way to test that, is the tilt test. Watch to see if there is any resistance to the piston as is drops. The rifle I had with this issue the piston would free fall, the piston should ease it's way down. I had a poorly fit op rod too on that rifle too but it caused the same malfunction. It had alot of miles on it.

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Old June 16th, 2017, 02:41 PM   #19
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a thousand is about twice the recommended amount for cleaning the gas system.

There are three drill bits used for this. One for the plug, one for the piston and one for the tail of the piston. I wish I could tell you which bits but that is long gone from my brain. It's on the forum somewhere.

If you don't have them you can soak piston and plug in solvent and use q tips to clean. this will get everything but the piston tail.

I use solvent on a .45 swab for the cylinder.

Remember when you put her all back together that the gas system is intended to run dry.

My money is still on the chamber, unless you know you've cleaned it recently. I would go ahead and get the bits if you don't have them.

A clean rifle is a happy rifle.

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Old June 16th, 2017, 02:56 PM   #20
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Well I just finished cleaning the gas system. The gas plug was horrible. It took about 5-10 minutes of drilling to get all the carbon out.

The piston itself wasn't horrible. Though it looks a little beat, probably from all the carbon so I just ordered a new titanium nitride sadalak piston

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Old June 16th, 2017, 02:59 PM   #21
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A clean rifle is a happy rifle.
Outstanding!

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Old June 16th, 2017, 03:46 PM   #22
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Op,

I had an issue with my rifle a couple of weeks back with it not extracting at all! Brass was stuck in the chamber and had to beat on the op rod to eject and chamber a fresh round.

Before I took her out the next time I cleaned and greased the best I know how to do and all was well again.

DID run a shotgun swab in my chamber!

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Old June 16th, 2017, 03:54 PM   #23
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ya gotta keep your piston clean

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Old June 16th, 2017, 05:07 PM   #24
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So What are we saying Here? You have to clean your M1A?

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Old June 16th, 2017, 05:12 PM   #25
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I have to clean mine once in a while SGT John SWF!

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Old June 16th, 2017, 05:18 PM   #26
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Originally Posted by Spike Spiegel View Post
Well I just finished cleaning the gas system. The gas plug was horrible. It took about 5-10 minutes of drilling to get all the carbon out.

The piston itself wasn't horrible. Though it looks a little beat, probably from all the carbon so I just ordered a new titanium nitride sadalak piston

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Damn boy,

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Old June 16th, 2017, 05:26 PM   #27
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Lol my bad

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Old June 16th, 2017, 05:32 PM   #28
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and he did not ever use the 'small' drill for the piston 'tail'? mine gets plugged

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Old June 16th, 2017, 05:36 PM   #29
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Soak that damn piston, so I can sleep!

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Old June 16th, 2017, 05:57 PM   #30
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Nothing different in the last 1000ish rounds.

federal premium 308 sierra matchking bthp. 168gr.

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I hope no one takes this the wrong way but...


people over clean their M14's. They soak the barrels with an enormous amount of solvent and then run that bronze brush through there 1000 times then go on to tear apart there gas system and clean the hell out of that.

(Just ask bambam and geeck about this topic they will tell you they would rather shoot the rifle to death then clean it to death) Oh and when you do all of that cleaning you loose your zeros.

If your M14 is correct from the get go which most of them are you don't need to do all that cleaning. Most of them function fine when they are fed the correct factory ammunition. 99% of the problems are caused by garbage reloads.

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