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Can some one ID this Thompson M1 bolt


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#1 BatBoy

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Posted 06 January 2019 - 05:43 PM

Hi-

Long time lurker.

Im new to Thompsons and recently picked up a Thompson M1 bolt from Apex when they had a couple for sale.

When my bolt arrived it had lightening cuts in it. I have never seen this before and cant seem to get any info on it.

My only real guess it was done to UP the cycle rate or maybe for sand. I know FN added lightening cuts to FAL bolts so they would operate better in desert environments.

Anyone have an idea what this is?

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#2 Bridgeport28A1

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Posted 06 January 2019 - 06:26 PM

How did APEX describe it? It looks nothing like a USGI sand cut M1 bolt.

Edited by Bridgeport28A1, 06 January 2019 - 06:33 PM.

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#3 BatBoy

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Posted 06 January 2019 - 07:53 PM

Described as USGI M1 bolt.

Im calling them and complaining. Id like to keep it, but Im not paying *Good* pricing for it.

I will see what they say.

Edited by BatBoy, 06 January 2019 - 11:02 PM.

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#4 Bridgeport28A1

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Posted 06 January 2019 - 09:08 PM

Is there a manufacturer marking (S, AOC, P) on the back of the bolt?
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#5 BatBoy

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Posted 06 January 2019 - 11:01 PM

S for Savage
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#6 jim c 351

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Posted 06 January 2019 - 11:20 PM

BatBoy,

I agree with your idea that the bolt was machined by Joe Blow to increase the ROF.

To avoid hammering the rear of receiver , a stronger recoil spring, of unknown strength , would be required.

I wouldn't use it in my gun, the M1 shoots fast enough as it is. 

Jim C


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#7 dalbert

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Posted 07 January 2019 - 11:48 AM

I wonder if it's an old Gunmachines bolt?

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#8 APEXgunparts

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Posted 07 January 2019 - 03:00 PM

Unfortunately that M1 bolt was identified as a lightened bolt (by me) yet got placed into inventory as a standard M1 bolt.
It was supposed to go to the photo area and be listed separately on the web site.
I would be happy to take it back.

I know the customer has been in touch with my Customer Service people.
This was one of the Thompson parts that we received when be bought all those semi-truck loads of material from Ohio Ordnance.
 

Richard


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#9 BatBoy

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Posted 07 January 2019 - 11:00 PM

Apex,

I have contacted your customer service team via phone and responded via e-mail.

This will be my last post on the subject until the matter is settled.
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#10 dalbert

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Posted 08 January 2019 - 11:45 AM

BatBoy,

Sounds like Richard will take care of the bolt issue.

It's been interesting to see this bolt, and I think it may have been a Gunmachines product back about 25 years ago.

David
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#11 BatBoy

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Posted 08 January 2019 - 08:59 PM

Dalbert,

They (Apex) have taken care of me. I guess my last post reads way hasher than I meant it to be.

Ive seen way to many jilted customers run down vendors in forums. Situations just like this, but some guy takes a simple mistake and turns it into a big soap opera.

My intent was to to say I would conduct my business off line with Apex and not be an idiot.

Edited by BatBoy, 08 January 2019 - 09:27 PM.

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#12 APEXgunparts

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Posted 08 January 2019 - 09:22 PM

Dalbert,

They (Apex) have taken care of me. I guess my last post reads way hasher than I meant it to be.

Ive seen way to many jilted customers run down vendors in forums. Situations just like this, but some guy takes a simple mistakes and turns it into a big soap opera.

My intent was to to say I would conduct my business off line with Apex and not be an idiot.

 

No worries!
We have all written something that picked up a "tone" we didn't intend for it to have!
I do appreciate you contacting my Customer Service and working with them to resolve this mistake.
When I saw the thread here I was curious to see what I could learn about that lightened M1 bolt.
If we had a large quantity of M1 bolts to sell I think I would have retained that one to see what the reduced mass would have been like to shoot.
I have a STEN bolt that is turned down in its mid section and you notice the ROF change as compared to standard bolts.
To me the practical value of the M1 bolt (over the M1A1 bolt) is that you can replace the firing pin.
The M1A1 bolt needs machine work done if the tip on the bolt face wears down.

We have been learning a lot about Thompson parts in recent months!

Richard


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#13 StrangeRanger

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Posted 08 January 2019 - 10:15 PM

The principal advantage of the M1 bolt vs. the M1A1 bolt is that if there is a failure to extract a ruptured case, an oversized next round or anything else that prevents the bolt from going into battery the M1 cannot fire out of battery but the M1A1 can and will.


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