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 Post subject: Ejection Port Cover does not close
PostPosted: Wed Jun 17, 2009 10:37 am 
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Piston Private
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I have an M6A2 in 5.56 w/14.7" barrel. The ejection port cover does not close at all, even with quite a bit of force placed on it. The little retaining pin and spring at the top of the cover seems to work perfectly when depressed with my fingernail or a small screwdriver, but the pin doesn't quite clear the top edge of the lower when you try and close it. There is a shiny spot there where you can see exactly where the pin is hitting the lower. Also, it even looks like the lower may be slightly dented there. I don't know if there is some machine that closes these things at the factory and it got smashed really hard to get it close or what. I don't mind the scratch and dent at all, but I would like my cover to close. Any suggestions, other than taking a dremel to the pin to shorten it by a tad?


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 Post subject:
PostPosted: Wed Jun 17, 2009 10:47 am 
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The Ban-erator!
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Post a pic and someone should be able to help you out.

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 Post subject:
PostPosted: Wed Jun 17, 2009 12:48 pm 
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Super Ninja Piston Warrior. Pow!
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RTB?

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 Post subject:
PostPosted: Wed Jun 17, 2009 8:30 pm 
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Piston Private
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300LW wrote:
Post a pic and someone should be able to help you out.


Will do when I get home tonight.


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 Post subject:
PostPosted: Thu Jun 18, 2009 4:37 pm 
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Generalissimo of the Piston Revolution
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I just got my M6A3 upper and I have the same issue. It looks like the spring-loaded ejection port cover detent is sticking up too far. A fingernail pressing it down will allow it to close.

Chase


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 Post subject:
PostPosted: Thu Jun 18, 2009 4:46 pm 
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Super Ninja Piston Warrior. Pow!
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I would shoot the detent pin with clp and work the shite outta it with my fingernail until it collapses the spring some.

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 Post subject:
PostPosted: Thu Jun 18, 2009 9:37 pm 
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Generalissimo of the Piston Revolution
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My M6A3 did the same thing. I just pushed the pin in and fit it into place a few times. Seems OK now. But the OP sounds like his is worse.


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 Post subject:
PostPosted: Thu Jun 18, 2009 10:10 pm 
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Generalissimo of the Piston Revolution
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I tried fully cycling mine in and out with a punch. It still won't close. And yes, the bolt is fully forward. I'm considering having my gunsmith dremel the detent down a tiny bit while maintaining the end radius.

Chase


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 Post subject:
PostPosted: Fri Jun 19, 2009 1:05 am 
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Piston Private
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Ok, here is my first attempt at posting picture...

Here is the wear mark I was talking about. The rifle is brand-new and came out of the box like this. Again, I don't mind the wear mark at all, just that the cover won't close and this seemed to be an interesting symptom.

Image

Here is a close-up of the same mark and the slight indentation I mentioned.

Image

This is a close-up of the cover pin itself.

Image

And this is me pressing down fairly hard on the cover trying to close it.

Image

Any thoughts? I'd hate to return it to LWRC for a simple little fix I could do myself. BTW, I tried TW25B on the pin, plus quite a number of depresses, but it still didn't get any better.[/img]


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 Post subject:
PostPosted: Fri Jun 19, 2009 2:59 am 
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Super Ninja Piston Warrior. Pow!
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Location: Mohave Desert Inn with the critters
Have the company send you another dust cover and replace it yourself.

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One loves to possess arms, though they hope never to have occasion for them.
--- Thomas Jefferson to George Washington, 1796.

"We must, indeed, all hang together, or most assuredly we will all hang separately."
Benjamin Franklin


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 Post subject:
PostPosted: Fri Jun 19, 2009 7:24 am 
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Location: Pooler, GA
Push in on the detent with a pen or nail while closing the door. Repeat until it is broken in and closes without the pen/nail.

The wear on the receiver is normal, even for a gun that has only had a factory test fire.

Stephen


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 Post subject:
PostPosted: Sat Jul 18, 2009 7:30 pm 
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Piston Private Recruit
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Location: The 50th State
My new A3 has the same problem.

It shows the same wear mark on the receiver. No matter how hard I press, the cover will not close. It will only close if I either slam it shut VERY hard, or use my fingernail to press in the pin while closing.

I've opened and closed the cover with my fingernail a bunch of times to try and break it in. I've also lubed the pin and worked the spring, but it doesn't seem any better.

I will try working the spring more before dropping a line to LWRC.


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 Post subject:
PostPosted: Sun Jul 19, 2009 12:54 am 
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The Hammer
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there is insufficient chamfer on the ejection port. Do as Stephen said.

Don't use CLP....

Use Slip and depress that plunger until it moves more freely.

you could stone that wear point lightly also, be careful not to break that edge. Just clean up that chamfer.

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 Post subject:
PostPosted: Sun Jul 19, 2009 12:56 pm 
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Piston Private Recruit
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Joined: Thu May 14, 2009 4:03 pm
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Location: Miami, FL
I have the same problem with an A3 upper that I just received. Seems like a QC issue to me.


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 Post subject:
PostPosted: Sun Jul 19, 2009 9:10 pm 
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Piston Private
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Location: Colorado
My new M6A3 does the same... Seems like it is getting better but still a pain.


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