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Old 09-08-2013, 01:41 AM   #1
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Hey forum,
I just added a quad rail and my light from deployment to my personal AR15 and when I began to check it I found a huge problem (well huge to me) and I have no clue what's wrong. I just got out of the marines today and moved back home to VA so it's not like I can have one of my armorer buddies come look at it for me. When I lock my bolt to the rear it seems like it's moving forward (it is) and that felt wrong to me. So I decided to try and insert a magazine to see if it'll still feed properly (it won't). The problem is is that the bolt locks to the rear with the catch manually engaged while sliding the bolt to the rear but has to slide forward to "catch" and it causes the front of the bolt to sit so far forward that the tip of the bolt sits on top of the rounds when I inset a new magazine. So now when I slap the bolt release to send it home and load a round it just slides over the rounds or jams. I really need some help here guys.

image-601615740.jpg

1. Bolt manually pulled all the way to the rear
2. The next is where the bolt is catching with the bolt catch
3. With mag inserted you can see the bolt is on top of the back of the rounds
4. Another view of the improper bolt placement



image-3076039212.jpg   image-3560785998.jpg   image-3572546949.jpg  
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Old 09-08-2013, 01:50 AM   #2
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Quote:
Originally Posted by BigRedUSMC
Hey forum,
I just added a quad rail and my light from deployment to my personal AR15 and when I began to check it I found a huge problem (well huge to me) and I have no clue what's wrong. I just got out of the marines today and moved back home to VA so it's not like
.....what?


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Old 09-08-2013, 01:50 AM   #3
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Quote:
Originally Posted by ZombieBrawler

.....what?
Lolololololololol
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Old 09-08-2013, 01:54 AM   #4
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Quote:
Originally Posted by ZombieBrawler

.....what?
Premature post it's fully up now my bad
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Old 09-08-2013, 02:27 AM   #5
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OK- couple of things to check.

Yes, your bolt IS going too far forward. Why?

Is any part of the rail interfering with the bolt catch lever? Remove upper, turn so you can look in, latch bolt to rear, push with thumb- and what is slipping? Is the bolt catch dinged up on the inside?

And do check that bolt/ Bolt carrier group is properly assembled.

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Old 09-08-2013, 03:29 AM   #6
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Premature post it's fully up now my bad
I thought i just needed another beer...
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Old 09-08-2013, 03:36 AM   #7
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The bolt on the AR will not lock open without an empty mag in the magwell. When there are rounds in the mag it should slide past the rim in order to strip a round out of the mag. Try inserting an empty mag and locking the bolt back with the charging handle. If the bolt hangs that far back with an empty mag then the problem may be in the stock, there is nothing that far back other than the hammer for the bolt to catch on...have you changed buffer springs? Is there a carbine length spring in a rifle length tube? Something else the rear of the bolt carrier is hanging up on?

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Old 09-08-2013, 03:40 AM   #8
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Quote:
Originally Posted by Jpyle
The bolt on the AR will not lock open without an empty mag in the magwell. When there are rounds in the mag it should slide past the rim in order to strip a round out of the mag. Try inserting an empty mag and locking the bolt back with the charging handle. If the bolt hangs that far back with an empty mag then the problem may be in the stock, there is nothing that far back other than the hammer for the bolt to catch on...have you changed buffer springs? Is there a carbine length spring in a rifle length tube? Something else the rear of the bolt carrier is hanging up on?
Everything internally is factory original. I haven't even shot it but twice so far. I had it at the range two weeks ago and it functioned great I just don't know where this is coming from. It's probably my bolt catch. It does the same thing with an empty mag
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Old 09-08-2013, 03:45 AM   #9
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Quote:
Originally Posted by BigRedUSMC View Post
Everything internally is factory original. I haven't even shot it but twice so far. I had it at the range two weeks ago and it functioned great I just don't know where this is coming from. It's probably my bolt catch. It does the same thing with an empty mag
Sounds like it. Does the bolt look ok? No missing teeth or anything? Is the bolt catch under tension, can you feel the spring tighten up? Do you remember "dropping the hammer" on the bolt catch with the upper removed?

Lot of questions I know.

BTW, welcome home and thanks for your service.
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Old 09-08-2013, 06:34 PM   #10
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Remove the upper and post some pics inside the upper and lower. Could be a broken bolt stop. Easy to break if you snap the hammer while the halves are separate.



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