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Bolt Stop Roll Pin Broken - Help!

This is a discussion on Bolt Stop Roll Pin Broken - Help! within the The M14 forums, part of the M14 M1A Forum category; Hi All, I was making great progress on my first LRB M14 build today until I ran into the bolt stop and its evil roll ...


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Old March 11th, 2017, 01:56 PM   #1
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Bolt Stop Roll Pin Broken - Help!

Hi All,
I was making great progress on my first LRB M14 build today until I ran into the bolt stop and its evil roll pin. I was having a difficult time driving it in which I now see is a common problem. I got it partway in and then the damn pin split on me. It's not in very far, but far enough where I can't get the stop out.

I tried pulling it out with regular pliers, then using vice grip pliers and banging on them with a hammer, but the thing won't move.

I'm taking a break before I damage something.

Should I dremel cut the remaining part sticking out and then try to punch it in with a brass punch to at least get the bolt stop out so I can start over with a new pin?

Really not psyched about this being my first post

Jim
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Old March 11th, 2017, 02:14 PM   #2
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The first thing you do when messing with the bolt stop is tape up the receiver so that you don't get tool marks in the finish.

I suppose you are beyond that at this point.

You need a flat sided punch. if you don't have one, you can modify a standard punch.

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Old March 11th, 2017, 02:16 PM   #3
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Welcome from NW CT.
My guess is that it mushroomed against the bolt lock. You can probably knock the bolt stop out from the inside and then cut the end of the pin off and remove.


Last edited by nf1e; March 11th, 2017 at 03:12 PM.
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Old March 11th, 2017, 02:19 PM   #4
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Quote:
Originally Posted by KurtC View Post
The first thing you do when messing with the bolt stop is tape up the receiver so that you don't get tool marks in the finish.

I suppose you are beyond that at this point.

You need a flat sided punch. if you don't have one, you can modify a standard punch.
You can say that again .....

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Old March 11th, 2017, 02:29 PM   #5
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Take a break, regroup. Don't rush it or you might crack the reciever.

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Old March 11th, 2017, 02:29 PM   #6
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http://www.brownells.com/gunsmith-to...prod26482.aspx
roll pin punches

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Old March 11th, 2017, 02:39 PM   #7
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Quote:
Originally Posted by POLACK View Post
Flat sided works best for this:
http://www.brownells.com/gunsmith-to....aspx?psize=96

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Old March 11th, 2017, 02:41 PM   #8
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Yes, the marring of the finish sucks, but it's not too bad.

I was using roll pin punches on the pin when it split. It's in far enough where the stop won't come out. I don't want to try to force it and break the ear.

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Old March 11th, 2017, 02:49 PM   #9
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All is not lost. You did the right thing by walking away and take a break. Been there and done that. Steps that I have used to pull my butt out of the fire.

1. Take Duct slide under pin to protect receiver 2-3" long
2. Take a pair of Vise Grips grab the pin where when you tap smartly with ball pin hammer the vise grips WILL NOT MOVE.
3. Maybe a little penetrating oil where pin fits into receiver
4. Re installing new pin
a. take new pin into cordless drill 1/8" and polish off parkerizing
b. a little grease or oil on new pin to ease going in
c. drive pin to opening 1/16" sticking out to catch bolt stop
d. drive pin with firm but gentle taps
Remember confession is good for the soul but bad for reputation
sent PM if you have any more questions
Pfc out

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Old March 11th, 2017, 02:50 PM   #10
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Quote:
Originally Posted by jmalerba View Post
Yes, the marring of the finish sucks, but it's not too bad.

I was using roll pin punches on the pin when it split. It's in far enough where the stop won't come out. I don't want to try to force it and break the ear.
You need to come in from the front with a flat sided punch or a really, really long regular punch. If you are handy (maybe not ) you can fashion something out of drill steel.

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Old March 11th, 2017, 03:09 PM   #11
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Been there and done that as they say and simplest way I found is as mentioned using the vice grips to pinch that pin tightly, and then tap the vice grips not hitting the receiver and eventually that will pull out the pin. Not saying with a great deal of force but a firm tapping with the hammer on the grip itself will normally cause it to come out. Also as mentioned that area of the receiver can be broken if struck with hammer, no reason to hit the receiver itself or the area which the pin is employed.

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Old March 11th, 2017, 03:30 PM   #12
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I prefer to put some blue painters tape on the receiver 1st, then cover that with duct tape. The duct tape will leave glue residue.

Thanks from Rich D
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Old March 11th, 2017, 03:50 PM   #13
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I'll give the vice grip hammer method another shot tomorrow, but I had no luck with it today. If that doesn't work I'll get the flat body punch and try to work it out from the front.

On a side note, I love that Kuleck spends approx two sentences on the bolt stop install and three pages on greasing a bolt.

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Old March 11th, 2017, 03:58 PM   #14
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What about heating the ear a bit?

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Old March 11th, 2017, 05:01 PM   #15
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This is the set I use:

http://www.midwayusa.com/product/451...tion-punch-kit

The hollow punch is used to hold the roll pin and get it started.

The dimple punch is used to drive it home without slipping.


In your case, you will need to: Tape up the front of the receiver. Get a piece of hardened drill rod or the long portion of an Allen wrench. Something that will fit in the smaller front hole. Use the hollow punch to tap in the rod far enough to knock out your old roll pin.

Use the punches to install a new pin.

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