AR Bolt Problem

Remington country

Remington country

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Hey Guys

I Posted a while ago about my AR i cannot seem to get the Bolt to go past the Bolt catch not sure whats going on. I tried Shortening the Buffer Spring still seems like its hitting on something in the Upper..

Thanks guys. Its a Rock River Upper on an Armalite Lower.
 
Ensure the bolt assembly is all the way forward in the bolt carrier. It sounds like it might be reward. There is a camming action that should occur and a bolt cam pin that will move in the bolt carrier.

D!NK
 
not sure exactly what you mean but Tonight Ill take a picture of the Bolt when i take it of the Upper and Post it for all you Gun GOO ROOS. This is my first AR Build it worked fine then all of a sudden cant seem to get the bolt to go back all the way..

THanks DINK
 
You can push and pull the bolt in the bolt carrier group. It needs to be pulled forward (greatest overall length) to be inserted in the upper with the charging handle.
 
What I think is happening is the bolt cam pin on your BCG is snagging on the upper receiver and that's stopping the BCG from slipping in. Making sure the bolt assembly is all the way forward should solve that. If that's not the case I'll have to think some.
So I found a battery charger for my camera and got my AR-15 out to have a look.

First I broke down the upper and lower. Make sure that the lower is not interfering with anything
img0964ak.jpg


Then check the BCG. The following picture is what I mean when I say the bolt assembly is reward.
img0966gr.jpg


I imagine that this is the problem you're having. The BCG goes into the upper but not far.
img0965wjz.jpg


This is what I man when I say it should be forward.
img0967pg.jpg



When you get home throw up your pics and we'll see if anyone wiser in the ways of the AR has some advice.


D!NK
 
AR.jpg

ARBOLT1.jpg


NewImage.jpg

Hey guys these picstures are from exactly what I took out of my AR the BSG is all the way forward on the one picture you will see the bolt cannot go all the way back

Thanks for everything
 
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Is this a new problem with the rifle or did it start when you put a new stock on it or some other mod?

It sounds like you might have a rifle length buffer in a carbine length buffer tube.

Hopefully it is something simple like that as it will only cost you around $35 to remedy that one.

Just re-read your posts again.
Are you saying you cant get it back together because the bolt won't go forward? If so the other posts above are probably your solution. Extend the bolt out of the BCG all the way before trying to slide it into the receiver.
If you are saying you can get it back together but the bolt won't move back far enough to chamber a round then maybe my solution.

Not exactly sure what your having problems with.

If you are free on Friday this week (FEB 3) I will be on shortchange and can meet you in FtMac and prob get it fixed right up in a couple minutes.

Good luck
 
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Thanks guys the Rifle goes together fine.. I have had the bolt catch work properly with this stock and spring.. The gun fired Fine when i used it the first time... I guess Ill try and purchased a new Carbine Buffer Spring and see if that works.

Thanks again
 
Measure the length of your buffer spring and show a picture of your buffer.
Something must have changed with the rifle (that nice skeleton stock?)
It sounds like you have a rifle buffer and/or spring in a carbine length tube.

PM me and I'll give you my email to send pics to so it's a little easier on you.
The rifle buffer is quite a bit longer than the carbine buffer and so is the spring. These are easy measurements that can be taken and cross referenced and should reveal your problem.
 
Will Do cr5. Thanks for the Help

Can I just cut my Spring down to a shorter length just to see if thats the problem then ill order the carbine spring. It really sounds like when i pull the bolt back like the BCG is hitting something in the back of the upper but it might just be there Stop on the Buffer Spring..
 
Remingtoncountry - Without trying to sound like an a$$hole, please stop before you hurt yourself. Cutting springs and modifying parts on a rifle when you don't fully understand how the system works (or doesn't work) is a recipe for disaster.

That aside; What happened when it stopped working properly? You said it was working fine in this same exact configuration and then just stopped working properly out of the blue. Remove the upper and look down into the buffer tube (receiver extension) with a flashlight and see if there is something down there that shouldn't be. Is your buffer tube screwed in far enough so as to be holding down the buffer retaining pin?
Take pictures of your buffer, spring, and tube without the upper on and we can give you a better idea. And Yes, buy a new carbine spring.
 
I completely agree with MALICE, don't cut or modify anything until someone that knows AR's has a look at it.
You need to answer our questions with specific accurate answers if you want us to be able to help you. Not just say it worked before and now it doesn't.

You sound like you are new to AR's and haven't done much research into the workings of an AR so your asking for trouble if you start trying to be a gunsmith. The buffer weight and spring tension are a balanced system and you may ruin your rifle or yourself if you mess with things.

The Internet is full of answers if you look.

Did you replace your stock or not? If you took an A2 rifle stock off and installed that skeleton stock you have a rifle buffer and a rifle spring in a carbine buffer tube and they are both too long to work in there.
A new spring and buffer should cost you less than $100 and will fix your problem.


I am in FtMac this weekend working nights fri-sun and can meet you in the afternoon to give you a hand if you want.
Either that or I'll give you $500 for it as-is.

PM me if you want help.
 
Thanks for the Wise advice. I was only considering cutting the spring to the carbine length to ensure that was the problem then I would Purchase the proper spring as there are not to many places around Northern Alberta for Parts. I measured the Buffer Spring it is exactly 12 1/2" the Buffer Tube is just shy of 10". Hopefully that will help to determine if I have a Rifle Sprong or the Carbine Spring

Thanks again for being Patient with a newbie
 
bufferspring.jpg


You have the bottom set then, which is correct for that stock.

Take a close look and see if it's possibly catching on the bolt catch itself?
 
Thanks cn_1 I was looking for something like that for him.

Rem country, measure your buffer tube length.
carbine length should be between 6 3/4 to 7 5/8 inch long depending if you have milspec or commercial (commercial is longer) or you will have an A1/A2 buffer tube which should be around 9 5/8 inch long.

If everything matches up and you have the matching buffer, buffer tube and spring then you must have a mechanical blockage within the rifle.

Did it work fine before you took it apart for cleaning or for some other reason then it didn't work when you put it back together?
What did you do with your rifle between when it worked and didn't work?
 
I misunderstood the original post. I though the BCG wasn't going back into the upper, if I'm following now; the BCG will not engage the bolt catch.
I agree with cr5 the buffer or buffer spring might not be the right size for you're buffer tube.

Try this;
1. remove the buffer assembly and buffer spring
2. make sure the the BCG will go all the way back in the buffer tube
3. install the buffer assembly
4. make sure the the BCG will far enough back in the buffer tube to engage the bolt catch

If you have to stop at step 2 something is seriously wrong.
If you get to step 4 but the bolt catch will not engage the buffer assembly may be the problem.
If you get to step 4 and the bolt catch will engage the buffer spring may be the problem.

You either have a rifle or carbine length buffer assembly.
A rifle buffer assembly in a carbine tube would mess things up for sure, but you said the buffer tube is just under 10 inches. 9 5/8" should be the rifle length buffer tube.

I would not recommend cutting the spring your self. You could make you're predicament worse.

D!NK
 
Sorry, I missed the part of your post where you said the tube is just shy of 10 inches. It sounds like you have the right tube and spring combination.

Unless your buffer tube has been damaged or there is debris in the tube and the buffer can't slide back all the way I can't think of anything else that would be causing this.
All I can suggest is to take it apart and inspect everything closely and look for anything that may be out of place or assembled incorrectly.

I would need to look at the rifle to be of any help now, I'm out of ideas.

Good luck, I hope you figure it out soon.
 
Is that stock supposed to use a short or long screw in the buttplate to secure the plate to the receiver extension tube? Maybe a long A2 screw is keeping the buffer from coming all the way back?
 
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