If you enjoy the forum please consider supporting it by signing up for a NES Membership The benefits pay for the membership many times over.
Care to expand on "problems"?
Is this still that '09 NES AR giving you problems? What is the issue with it?
My buffer tube has got a small extension on the end of it
and the spring length is close to 13 inches. I'm wondering if the buffer tube I have is not a standard one and this one is intended
to increase spring pressure. That's as far as I've ventured.
Refresh my memory... that AR has a White Oak Armament barrel, correct? What manufacturer for the upper, bolt and bolt carrier? It's been, like, 2 years since I chatted with you about it.
That extension piece is normal. It fills the length difference between the original A1 stock and the slightly longer A2 stock. (Both use the same receiver extension.)
Your action spring is well within spec (11 3/4" min to 13 1/2" max according to the TM)
Short-stroking is usually gas-system related.....
Do you have different buffers to try? I assume you're using a rifle buffer.
Or better yet, can you put a different upper on there and try that? That would let you rule out the lower. You could also swap your upper onto another lower and see how that works.
apologize if these are things you thought of right away. I don't know the history here or your troubleshooting skills.
ETA: I had the wrong screw (too long) on my stock and it prevented the buffer from fully cycling. It wouldn't lock back on the last round. If you're seeing that, it might be something else to check.
I have a carbine buffer and spring. I might try the spring with the rifle buffer.
Wait, you're using a carbine buffer and spring with a rifle receiver extension? The spring length that you mentioned above indicates rifle length...
I thinkin a carbine buffer in a rifle tube is bad boo boo. Nothing to stop the bolt from overtraveling to the rear.I have a carbine buffer and spring. I might try the spring with the rifle buffer.
I thinkin a carbine buffer in a rifle tube is bad boo boo.
Patriot,
I had an overlength spring provided to me by Magpul with one of their stocks. The gun would sometimes, but would never lock back. It was also difficult to lock the bolt back manually.
To troubleshoot, I turned the buffer tube one full turn out of the receiver. (be careful the buffer retainer plunger will be released when you do this). I then tested it and it worked like a charm. So I left it that way. Its easy to use an ar without a buffer retainer. Just hold the buffer back and close the upper onto it.
However you do it, please turn the buffer tube one turn out from the receiver and test.
Its not gheto. Its a diagnostic process. I'm not saying to leave it that way. Well, maybe I am.
Either way. I'm primarily advocating that he try this for diagnostic purposes. The gun I did this on is purely a toy. If I cared about it being proper, I change the spring.
As it is, magpul replaced the spring, but that went into my parts box for future use.
OK. as a permanent way to run a gun, guilty as charged.
But as a diagnostic step, its a good thing.
I actually know a guy who has a colt A1 m16 registered machine gun. That is a $15,000 lower.
He runs KNS pins in it and has removed the buffer retainer. This is all in the name of minimizing wear and tear on the lower. Its of course, a toy. So its a perfectly reasonable thing to do.
Wait, you're using a carbine buffer and spring with a rifle receiver extension? The spring length that you mentioned above indicates rifle length...
He should just print out another one on a 3D printer and use the exact same serial number. That way he'd have a spare.
Just kidding, please NOBODY do this.
Agreed
Sounds like you are mismatched.
So clearly the problem was you weren't getting enough gas to move the bolt back fast/far enough to function. The lighter buffer and shorter spring allowed more travel for your given gas system and the gun worked.
This is one of the reasons that I am partial to adjustable gas blocks. You can even get an adjustable A2 front sight base if you want a traditional look.
Don
I added a pic of the setup and appreciate your response...if my upper is not providing enough gas, but is consistent and it now works with this non-standard setup...should I leave well enough alone (just keeping a close eye for any markings on the back of the lower to indicate too much blow back?)?
Sorry to hijack the thread...
Not to confuse this thread any further, but I had a couple issues with an Ace stock in the past. The first problem was the charging handle riding the foam on the top of the stock. This was easily solved by cutting the foam in half allowing clearance for the charging handle.I added a pic of the setup and appreciate your response...if my upper is not providing enough gas, but is consistent and it now works with this non-standard setup...should I leave well enough alone (just keeping a close eye for any markings on the back of the lower to indicate too much blow back?)?
Sorry to hijack the thread...
This is the most confusing thread ever.
What is "non standard" about your configuration?
What is it exactly that works and doesn't work?