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3/31/2007 12:06:13 PM EDT
Each time I change the mag I have to pull the charging handle. Any idea about what can happen?
3/31/2007 12:08:30 PM EDT
[#1]
I don't get it.  Is it catching but won't release or not catching the bolt?
3/31/2007 12:09:57 PM EDT
[#2]
Is the bolt locking back after firing a mag?
3/31/2007 12:26:11 PM EDT
[#3]
Try replacing every part of the bolt catch (the actual catch, the roll pin, the plunger, and the spring) with high quality stuff (Colt possibly). If not..may be the lower? Or the mag? What mags are you using?
3/31/2007 12:45:13 PM EDT
[#4]
Sorry, I should have given more information: it catches the bolt after the last bullet is fired, what it doesn't do is push the first bullet of the next mag. It releases the bolt and the brass appears scratched.

I use 10 & 20 plastic and metalic mags, the same with both.
3/31/2007 12:48:56 PM EDT
[#5]
Is this happening with all mags?  It sounds like your mags are sitting too low or the front of the bolt is sitting on top of the first round in the mag.  Mostly the latter, I would think.
3/31/2007 12:55:33 PM EDT
[#6]
Get some USGI mags and go from there.  Aftermarket mags are to be avoided at all costs.
3/31/2007 1:05:29 PM EDT
[#7]
height=8
Quoted:
Is this happening with all mags?


With all of them.


height=8
Quoted:
It sounds like your mags are sitting too low or the front of the bolt is sitting on top of the first round in the mag.  Mostly the latter, I would think.


Yes, maybe the second.  The rifle is .222, not .223, and the bullet is a little bit shorter. I always align the bullets at the back of the mag after loading, maybe I should do it at the front. The mags are .223. not .222.
3/31/2007 1:07:10 PM EDT
[#8]

Quoted:
Get some USGI mags and go from there.  Aftermarket mags are to be avoided at all costs.


A good place to purchase them?
3/31/2007 1:10:05 PM EDT
[#9]

Quoted:

Quoted:
Is this happening with all mags?


With all of them.



Quoted:
It sounds like your mags are sitting too low or the front of the bolt is sitting on top of the first round in the mag.  Mostly the latter, I would think.


Yes, maybe the second.  The rifle is .222, not .223, and the bullet is a little bit shorter. I always align the bullets at the back of the mag after loading, maybe I should do it at the front. The mags are .223. not .222.


AHA.  Split your rifle, take a mag with some empties in it and insert into the lower, take the bolt carrier and put it up against the bolt catch.  See what it looks like.  Might give you a clue.
3/31/2007 1:17:23 PM EDT
[#10]

Quoted:

Quoted:

Quoted:
Is this happening with all mags?


With all of them.



Quoted:
It sounds like your mags are sitting too low or the front of the bolt is sitting on top of the first round in the mag.  Mostly the latter, I would think.


Yes, maybe the second.  The rifle is .222, not .223, and the bullet is a little bit shorter. I always align the bullets at the back of the mag after loading, maybe I should do it at the front. The mags are .223. not .222.


AHA.  Split your rifle, take a mag with some empties in it and insert into the lower, take the bolt carrier and put it up against the bolt catch.  See what it looks like.  Might give you a clue.


Tomorrow at the range, I'm sure this will help.

I'll have to buy some mags too...

3/31/2007 1:23:04 PM EDT
[#11]
Good luck.
3/31/2007 1:37:21 PM EDT
[#12]

ar15.com/forums/board.html?b=7

Lots of USGI - type mags for sale there.

3/31/2007 1:41:28 PM EDT
[#13]
Time out.  I just tore mine apart and my theory on the bolt is physically impossible.  It is either a mag problem or the bolt catch is buggered up somehow.  Good luck.
3/31/2007 2:06:42 PM EDT
[#14]

Quoted:
ar15.com/forums/board.html?b=7

Lots of USGI - type mags for sale there.


According to his location, he can't take advantage of that unless he finds a shipper that will do the required export paperwork.
3/31/2007 2:10:31 PM EDT
[#15]

Quoted:

Quoted:
ar15.com/forums/board.html?b=7

Lots of USGI - type mags for sale there.


According to his location, he can't take advantage of that unless he finds a shipper that will do the required export paperwork.


Don't worry, it shouldn't be a problem. I found some interesting offers, thanks.
3/31/2007 2:15:03 PM EDT
[#16]

Quoted:

Quoted:

Quoted:
ar15.com/forums/board.html?b=7

Lots of USGI - type mags for sale there.


According to his location, he can't take advantage of that unless he finds a shipper that will do the required export paperwork.


Don't worry, it shouldn't be a problem. I found some interesting offers, thanks.


I'm sorry - I didn't note the location.







Let's make sure we've got this right:

The magazines are pushing the rounds up high enough to allow normal function as the magazine empties in the course of shooting - but then upon insertion of a new magazine, the bolt rides over the top round.

I assume that upon insdertion of a new mag, y7ou're hitting the bolt release, allowing the bolt to slam home, right?

3/31/2007 2:55:09 PM EDT
[#17]

Quoted:

Quoted:

Quoted:

Quoted:
ar15.com/forums/board.html?b=7

Lots of USGI - type mags for sale there.


According to his location, he can't take advantage of that unless he finds a shipper that will do the required export paperwork.


Don't worry, it shouldn't be a problem. I found some interesting offers, thanks.


I'm sorry - I didn't note the location.







Let's make sure we've got this right:

The magazines are pushing the rounds up high enough to allow normal function as the magazine empties in the course of shooting - but then upon insertion of a new magazine, the bolt rides over the top round.

I assume that upon insdertion of a new mag, y7ou're hitting the bolt release, allowing the bolt to slam home, right?



That´s it, everything goes as it should except that first round when pressing the bolt release button.


MisterBreeze, I saw your IM, I´ll check how/where the mag rests and see if I discover tomorrow at the range what can happen with what you all sugested.

3/31/2007 3:11:47 PM EDT
[#18]
How tight does your mag sit in the magwell?  Is there any play at all...especially rocking front to back movement?  I'm thinking your carrier may be out of spec.  Reason I say this is...when you're firing the rifle, the BCG makes it back all the way to strip off the next round to put it in the chamber.  However, if you use the bolt catch, I'm thinking your BCG is not far enough back and therefore riding on top of your mag....assuming your mag sits good in the well.  Either that or your lower is out of spec as far as where the bolt catch should be.  


Try w/ the BCG closed, insert a mag into the lower.  Then pull the CH back and let the BCG fly home.  If it's doing it then....I would suspect it's your mags or lower.  If it's not doing it then...I would suspect either out of spec BCG or Lower.  BTW what brands are your lower and BCG?
4/1/2007 1:34:48 PM EDT
[#19]

Quoted:
How tight does your mag sit in the magwell?  Is there any play at all...especially rocking front to back movement?


Very tight, sits well.



Quoted:
I'm thinking your carrier may be out of spec.  Reason I say this is...when you're firing the rifle, the BCG makes it back all the way to strip off the next round to put it in the chamber.  However, if you use the bolt catch, I'm thinking your BCG is not far enough back and therefore riding on top of your mag....assuming your mag sits good in the well.  Either that or your lower is out of spec as far as where the bolt catch should be.


Yesterday at home, after reading that, I thought that was going to be the problem. The rifle was made in Germany and it's not the first time I have problems with parts that doesn't fit because it's not mil-spec.

Today at the range I saw that the BCG stops 0,5in over the bullet, that's why it doesn't catch it and scratches the brass.

Now I have to find why other 5 friends have the same rifle and my bolt catch is the only that doesn't work correctly.



Quoted:
I would suspect either out of spec BCG or Lower. BTW what brands are your lower and BCG?


Oberland.
4/1/2007 1:35:20 PM EDT
[#20]
Thanks for the help.
4/1/2007 2:17:04 PM EDT
[#21]

Quoted:

Quoted:
How tight does your mag sit in the magwell?  Is there any play at all...especially rocking front to back movement?


Very tight, sits well.



Quoted:
I'm thinking your carrier may be out of spec.  Reason I say this is...when you're firing the rifle, the BCG makes it back all the way to strip off the next round to put it in the chamber.  However, if you use the bolt catch, I'm thinking your BCG is not far enough back and therefore riding on top of your mag....assuming your mag sits good in the well.  Either that or your lower is out of spec as far as where the bolt catch should be.


Yesterday at home, after reading that, I thought that was going to be the problem. The rifle was made in Germany and it's not the first time I have problems with parts that doesn't fit because it's not mil-spec.

Today at the range I saw that the BCG stops 0,5in over the bullet, that's why it doesn't catch it and scratches the brass.

Now I have to find why other 5 friends have the same rifle and my bolt catch is the only that doesn't work correctly.



Quoted:
I would suspect either out of spec BCG or Lower. BTW what brands are your lower and BCG?


Oberland.


I'd love to see pics of that malfunction - and the rifle itself - if possible.

Do you have to store it at the range in ESP?

4/1/2007 2:21:55 PM EDT
[#22]
Since you have friends with the same rifle, try one of their bolt/carriers in your gun and see if you have the same symptoms.
4/1/2007 2:37:43 PM EDT
[#23]

Quoted:
Since you have friends with the same rifle, try one of their bolt/carriers in your gun and see if you have the same symptoms.


Good idea, I'll try it and see what the manufacturer has to say. Thanks.
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