Need part number for EARLY Mossberg 500 firing pin

[IAMCRAZYDAVE]

Hi all, my first post here on CGN.

I own an early (pre-1970) Mossberg 500A 12ga with a broken firing pin.
The pin I am looking for does NOT have a spring, and has been described as an early "ROCKER" type firing pin.

The folks at western gun parts weren't a lot of help, as they said that there were several types of pins in their inventory, and they "needed a part number".

Below are a couple of pics of what I've got, any help on this is greatly appreciated!

-Dave

 

[hunter5425]

Welcome to CGN. Try here ht tps://www.gunpartscorp.com/Products/949790A.htm , the are currently sold out but a call will let you know when they expect more.

 

[IAMCRAZYDAVE]

Thanks hunter, I saw that one, but I don't think it's the right one.

It looks to me like that pin has a ridge in it... any other suggestions?

 

[gunrunner100]

I have a bolt identical to yours and it may have the firing pin you need. Give me a couple days to get to it. Working...

 

[IAMCRAZYDAVE]

Excellent news gunrunner, Thank you so much!
I start my nightshift on Monday night, and will be on shift for 5 nights, so no huge rush.

Post pictures when you find it!

-Dave

 

[gunrunner100]

I don't think this is the one. Yours appeared round front, this one is flat.
You can always replace the bolt.

 

[IAMCRAZYDAVE]

Thanks man.
I might grab that from you anyhow, even if I need to modify it... are you willing to sell & ship me the complete bolt?
Let me know.

Dave

 

[gunrunner100]

PM me Dave.

 

[hitman@187]

I have exactly the same problem as you, my firing pin broke at the base a couple of days earlier. I have an old mossberg shotty with the engraved fish scales on the bolt and it seems that this is the firing pin we need https://www.gunpartscorp.com/Products/1159370A.htm

 

[IAMCRAZYDAVE]

Gunrunner: Pm Sent!

Hitman: Thanks for the reply, but that pin is for a 16, 20 & .410 Ga, not a 12 Ga.

 

[IAMCRAZYDAVE]

FYI Bump!

FYI to all:
I took some measurements and had my bro do a CAD drawing of the firing pin for early Mossberg 500A's.
Western Gun Parts was able to use the measurements I gave them to find the correct pin, a slightly different design, but it works!

The part number they gave me for the new pin is: 7427

The important dimension is the 1.19" (or there abouts) as the rocker block is different on early Mossbergs.

(BTW: many thanks to gunrunner100 for shipping me a complete bolt, and allowing me to return it to him as it has the newer, different pin and rocker block)

The new pin varies slightly in design, but has the correct dimension I mentioned earlier.
(apparently, the early firing pin design was only used in the first few years of 500A production, as it is inherently weak and failure prone... my dad originally purchased this particular shotgun in 1964)

I hope my experience on this will help other CGN's with the same problem... pics are below!

Cheers!
Dave

Original Broken Pin:

CAD Drawing with dimensions:

New Pin: