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Old 05-20-2014, 06:29 PM
Bobin Maine
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My 151K needs a firing pin & a rear sight.



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The rear barrel sight needed is a S134 that attaches to the barrel with two screws. This rifle also needs a firing pin # R475. Slight wear marks on these parts is O K. Bob.
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Old 05-20-2014, 06:38 PM
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www.havlinsales.com

These folks should have the pin You might ask them about the rear barrel sight.
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Old 05-20-2014, 07:18 PM
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Smile A quick fix...

Quote:
Originally Posted by Bobin Maine View Post
The rear barrel sight needed is a S134 that attaches to the barrel with two screws. This rifle also needs a firing pin # R475. Slight wear marks on these parts is O K. Bob.
A quick fix would be to gently tap the end of the firing pin to cold forge it, which will lengthen it. Go slowly and make sure you don't have any sharp edges on the firing pin that could pierce the cartridge rim. A 6 inch dial caliper would be an ideal tool to measure the increase in length as you work the FP.
The FP is hardened but a file will still cut it so it is not that hard that it can't be successfully cold forged, but since it is hard you can fracture the metal if you go too fast or use too much force.
A 4 to 6 lb hammer clamped in a vice would act as your anvil and a 4 to 8 oz hammer is what I have used to work several of the FP's in some of my Mossbergs. Give the FP 4 or 5 hits with the hammer. rotate it 90 degrees repeat the 4 or 5 hits, rotate 90 degrees, etc. Keep the hammer blows as even and as uniform as possible to prevent a deformed or bent FP. Go slow and easy and measure often. For me bright lighting and magnifiers are mandatory!!!
God Bless, Frank.
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Old 05-20-2014, 07:38 PM
tfrank
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Talking One of...

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Originally Posted by blkwollf View Post
I have one!!!
One of what??? The rear barrel sight or the FP... or both??? I betcha Bob would like to know that little detail!!! Is the BOLD AND UNDERLINING a hint!!!
God Bless, Frank
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Old 05-21-2014, 10:07 AM
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My 151K needs a firing pin & a rear sight.

tfrank is right on the cold forging! What do you have to lose? As stated go slow, keep everything flat and level and just light pecks with the hammer on the rear of the pin! It will grow! Peck slowly and measure often. You may still need to file the top and bottom of the pin as it may be too large to fit back in the bolt. You can also do the same on the front but the surface needs to be smooth so the case does not rupture!!! Start with the rear!! But if i the firing pin isn't making a mark on the shell casing you may still need a new firing pin. Welcome to GUNSMITHING 101!

Last edited by gunsisme; 05-21-2014 at 10:11 AM.
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Old 05-21-2014, 12:02 PM
Bobin Maine
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tfrank. About 1/2" is broken off my pin. To much missing; don't you think? Bob.
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Old 05-21-2014, 01:01 PM
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My 151K needs a firing pin & a rear sight.

You might peen .015 to maybe .032 max but 1/2! You meed a new firing pin
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Old 05-21-2014, 07:32 PM
tfrank
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Yup, that...

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Originally Posted by gunsisme View Post
You might peen .015 to maybe .032 max but 1/2! You meed a new firing pin
Yup that is a fact!!! Call the Havlins!!! And/or check ebay, GB, AA, etc!!!
God Bless, Frank.
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Old 05-23-2014, 07:12 AM
Bobin Maine
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Havlin will supply me with the pin and aperture. Good advice on this forum. The 151K was used as a parts gun, despite fine condition. The reason for being striped was the upside down tension spring mounted in the stock. That made the rifle malfunction by not feeding cartridges from the tube magazine.
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