Stag 10 wont pivot open

If I do that buffer tube will no longer hold in retainer. There is a notch on buffer tube retainer will no longer sit in unless I do a full rotation which will be to far

Remove the buffer/spring and file down the part of the buffer tube that over-extends into the receiver? Only if you're certain that the over-extension is the problem, I can't quite tell from the photos. Or just send it back again.
 
I think you'll have enough buffer tube to hold the retaining pin even with one turn back. The pin doesn't have to fit perfectly in the cutout just enough to keep the retaining pin in place

In the meantime you can take both pins out and slide the upper onto the lower like sliding a pistol slide back onto the frame and the close both pins instead of trying to close it like a clam shell.

Shouldn't have left the factory like that but it is an easy fix if you have access to an AR 15 armourers wrench. You're in every right to return it but that's a long trip back and forth for an easy fix.
 
How is it possible for the tube to go past the pin?

And not all buffer tubes has a notch.

Whoever put it together wanted to fill the notch instead of just retaining the pin and didn't check to see if the tube had extended too far.

If the tube didn't have a notch there likely would have been no problem.
 
I think you'll have enough buffer tube to hold the retaining pin even with one turn back. The pin doesn't have to fit perfectly in the cutout just enough to keep the retaining pin in place

In the meantime you can take both pins out and slide the upper onto the lower like sliding a pistol slide back onto the frame and the close both pins instead of trying to close it like a clam shell.

Shouldn't have left the factory like that but it is an easy fix if you have access to an AR 15 armourers wrench. You're in every right to return it but that's a look trip back and forth for an easy fix.

I'm worried because it only sits half way in notch now. Can I not buy a new in spec buffer tube and proper wrench and fix myself? Or will this void my warranty if I have further problems which I wouldn't find hard to believe

Really don't want to send for warranty second time lol
 
It's a simple fix - unscrew the buffer retainer nut, unscrew the buffer tube a few turns, tighten buffer retainer nut. I agree, however, the rifle never should have never been assembled like that in the first place much less left the shop after it was apparently looked at and test fired.

You clearly have no idea how a buffer tube works, and what it does.


How is it possible for the tube to go past the pin?

And not all buffer tubes has a notch.

It's not going past the pin.
 
TKe a screwdriver and take the castlenut off, it’s not that hard to do.
Or a pair of Chanel lock pliers and remove it.

Take the tube off , cut an 1/8 of an inch off the tube.

Re install so it just barely catches the pin.


Or buy a new tube.

Or send it back.

And someone had to close it , in order to ship it.
 
I don't know if any of you have ever built an AR, BUT YOU CAN'T THREAD A BUFFER TUBE IN TOO FAR. It's impossible.... Where are you guys coming up with this stuff?
 
TKe a screwdriver and take the castlenut off, it’s not that hard to do.
Or a pair of Chanel lock pliers and remove it.

Take the tube off , cut an 1/8 of an inch off the tube.

Re install so it just barely catches the pin.


Or buy a new tube.

Or send it back.

And someone had to close it , in order to ship it.

Ya, don't do this to a brand new $2000 rifle that's under warranty....
 
I don't know if any of you have ever built an AR, BUT YOU CAN'T THREAD A BUFFER TUBE IN TOO FAR. It's impossible.... Where are you guys coming up with this stuff?
That’s what I thought, as well.
So it has to be the lower or the BCG?

In any event, it’s a SH!T show.

I’m new at this as well , but have assembled two of these ,without any issues.
If this came fully assembled and was Fuc ed up from the factory, I’d be getting a refund.
 
I can tell it's the tube. Just don't know if I should fix or if I should worry enough to send back

If you want to fix it properly, you can buy a new tube and the castle nut wrench and fix it yourself. It's really easy. But buy the tools and do it the right way, not with a screwdriver and a hammer.

Your other option is to send it back.

Those are the only two sensible options.

Personally, I'd send it back and be pretty firm on being compensated somehow
 
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Mine seems to work fine as such.
 
I don't know if any of you have ever built an AR, BUT YOU CAN'T THREAD A BUFFER TUBE IN TOO FAR. It's impossible.... Where are you guys coming up with this stuff?

Most tubes will go in too far. Only by a single turn at most though. Not the case for the OP. One of many examples I’ve read/experienced. http s://www.ar15.com/forums/ar-15/Buffer_Tube_Screwed_in_too_far/66-453989/

The tube it too long on the threaded end, it’s out of spec or for a different firearm. You can use the slide/2 pin method or send it back. Installing a new tube would void warranty unless you get it in writing from Arms East that it doesn’t. Good luck!
 
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