Please help my ar-15 is broken

bobbyhill

bobbyhill

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I sent my gun to a smith and had it re-barrled (now 10.5inch) and threaded it. I went to the range today and not 1 round would cycle the gun never ejected a casing once and I used 3 types of ammo. The bolt just blows half open. Why is it doing this, can anyone help me fix it and how much will it cost.
 
sounds like he did not line up the gas posrt properly with the front sight tower, either that or he did not enlarge the hole to increase gas flow, but since your getting a FTE my guess is the front sight tower is not lined up right.
 
For what you paid,don't try to analize the problem, just bring it back.
If he's any kind of smith he'll stand behind his work.
 
You know, I hear these stories sometimes, and wonder. Didn't the friggin smitthy test the gun before he sent it back? You'd think it would be a no brainer.
 
Sounds like a partial blockage of the gas port. Have that checked and make sure your gas tube isn't gunked up either. An M-16 bolt carrier group (heavier than standard semi-auto AR-15) and/or H2 buffer will help soften the violence of the short gas system and slow down the whole cyclic rate of the rifle; which should translate into a more reliable firearm that generates less wear and tear. At this point, you don't need either. Get the gas blockage taken care of first and then see how reliable your shorty is thereafter. Then, if necessary, you can start looking at making some changes.
 
Where do I get a h2 buffer guys and what is it. Should i send the gun back to him or can someone tell me of a good AR smith
 
bobbyhill said:
Where do I get a h2 buffer guys and what is it.
[...]
Should i send the gun back to him
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If you have to ask, don't get one just yet.

And yes, of course send it back. If your car mechanic installed larger rims and low-profiled tires and all of a sudden the car pulled left, would you fix it yourself? You'd send it back!
 
Is this a factory barrel or a chopped barrel? - a straight barrel swap should not have affected the gas block.

And who is this "gunsmith"?

AR smith - I suggest "Arwen Ace" here. I think Armseast does AR as well.
 
Ill send you a pm. Iam not sure what was done or what barrel I have I just asked him to make my gun 10.5inch ( and have it work).
 
I've fallen and I cant get up.........do some research, this topic has been around since shorty's have been having teething problems. Arm chair armorers can't help you, there are far too many variables. Part of the intrigue of AR's is to make them run flawlessly, research and all will be clear. Unless the 'gunsmith' is really familiar with AR's do yourself a favor and figure out the problem yourself, its not rocket science. Try looking at the AR15.com website.
 
bobsonofbob said:
I've fallen and I cant get up.........do some research, this topic has been around since shorty's have been having teething problems. Arm chair armorers can't help you, there are far too many variables. Part of the intrigue of AR's is to make them run flawlessly, research and all will be clear. Unless the 'gunsmith' is really familiar with AR's do yourself a favor and figure out the problem yourself, its not rocket science. Try looking at the AR15.com website.
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I agree in principle (it's always better to have more knowledge), but at the same time if you pay for a service, you'd better get it. In this case it's the smith's responsibility to make this right.
 
eigenvector, you are 100 % on the try and get the smith to pay. After many poor quality issues with 'gunsmiths' I decided to do as much as I can without one. Its sad that newbies often get the shaft. Sort of like when a woman that knows nothing about cars, gets taken by unscrupulous mechanics. I hope this fellow gets more satisfaction than I ever did from his smith of choice. The answers are out there, you just have to find them. :)
 
-Is your gas tube correctly aligned?
-Is your gas port correctly sized?
-Is your receiver NOT crushed, preventing free movement of the bolt carrier?

It isn't due to buffer weight, etc.

If your smith used the same sized gas port as was on your longer (16?) barrel, it is not going to work, it will be undergassed, and will not eject/cycle. If your bolt moves freely, I'd look at the gas port.

Your smith should fix this for you.
 
Assuming your gas port is properly aligned :

You need to ask the gunsmith what he opened the gas port to. I assume that your barrel was a 14.5 that was cut down to 10.5 and rethreaded. If he looks at you funny then find another smith

Typically the 10.5 ( Noveske / WOA etc ) has has a gas port of .076 ( this corresponds to a #48 in case you don't have a drill chart ). This is significantly larger than a typical 14.5 barrel ( .063 )

Check if he REAMED your gas port to a #48. Some 10.5s ( LMTs for example ) are .073 ( #49 )

.076 works better than the .073 if you are running heavy buffers ( H2 , H3 etc ) IMO I would see how it runs at .076 before going any larger

Hopefully he did it in stages so not to leave a burr

A good quality #48 and #49 reamer is $10. No reason to use a drill.

Are your running .223 SAAMI or 5.56 nato pressure ammo ?
 
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