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How to Determine Original (Old) vs Revised (New) Main Spring Housing

This is a discussion on How to Determine Original (Old) vs Revised (New) Main Spring Housing within the P238, P938 Pistol forums, part of the SIG Sauer Pistols category; Ahh... there ya have it! The difference between a polymer plastic and a fibre glass component. Seems logical to me. Sent from my iPad using ...


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P238, P938 Pistol All variations P238, P938

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Old 09-09-2016, 04:26 PM   #76
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How to Determine Original (Old) vs Revised (New) Main Spring Housing

Ahh... there ya have it! The difference between a polymer plastic and a fibre glass component. Seems logical to me.


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Old 09-09-2016, 04:48 PM   #77
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oh sorry, i didn't know there was two kinds.

poly and g10
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Old 09-09-2016, 06:28 PM   #78
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I called SIG C/S this morning. I wanted to send my P938 to them to upgrade the MSH with the new version, at my expense. I was asked if there was a malfunction and I said no. He asked the number of rounds through the gun. I told him about 500, although that's probably too high. He told me if it's working properly (it is) than don't fix what ain't broke. He told me to keep on the watch for a malfunction and then send it in.
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Old 09-10-2016, 01:10 AM   #79
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How to Determine Original (Old) vs Revised (New) Main Spring Housing

First time I've heard of that (from Sig) on a P938; but that's very much their position on a P238. You might try again in a few days (with a different C/S Rep) - OR maybe Sig has changed their "official" position on the upgrade (there was never a 'recall' issued).


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Old 09-10-2016, 07:21 AM   #80
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I thought it was odd that he said that since I was willing to pay for the upgrade and shipping cost. About a month ago I spoke to a SIG C/S rep and he said it would cost $55 for shipping (both ways) and $50 for the parts. After some thought I was willing to spend the money. It is my warm weather everyday carry and I feel I am worth $105 for my self-defense. Here in Wyoming it will soon be cool enough to conceal my P239 so I can send my P938 in for the upgrade. I will contact C/S again soon for the upgrade.
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Old 10-02-2016, 06:39 AM   #81
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FWIW, my P938 BRG born in Aug 2015 came with the Gen 2 upgrade. Thank you all for the useful information. I'm new here but really enjoying this forum.
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Old 10-14-2016, 05:21 PM   #82
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How to Determine Original (Old) vs Revised (New) Main Spring Housing

Well Sig came through; I had received the poly MSH (Gen 2) but as they had told me, the Gen 2 Sear Sping had to be back-ordered. It showed up this past week so I did the swap out Gen 2 install tonight on my P238. A fairly straight forward process (with the help instructions on You Tube, of course). Dry fire mechanics all seem to be in good working order but obviously a trip to the range tomorrow is called for.


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Old 10-21-2016, 11:31 AM   #83
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Just got off the phone w/ SIG/CS RE: my '14 P838.

They said that it was not a warranty issue, as there was no "recall", but that the parts may be upgraded if the pistol was in for service for another issue.

After some back-and-forth RE: the pistol, and how it is my SD carry piece, they offered to sell me the parts for $7.40, and comp the shipping.

I said yes.




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Old 10-21-2016, 03:41 PM   #84
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... but that the parts may be upgraded if the pistol was in for service for another issue.
Weren't you having an issue with your 7 round mags dropping?
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Old 10-31-2016, 09:44 AM   #85
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Sig CS is either very confused or they simply don't know what the hell is going on> I just got off the phone after discussing the MSH issue and was told that they would replace the MSH....no charge mentioned and no back pedaling based on warranty.

That is very poor CS!
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Old 10-31-2016, 09:49 AM   #86
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Now, for a technical question related to the MSH and auto fire condition. Does anyone know or has someone at Sig described the exact physical process taking place to allow the striker to ignite the primer? For example, is the striker actually getting held momentarily and the released because the sear spring is unable to hold it in position or is the striker actually slingshotting forward after the recoil compresses it and the slide moves faster than the striker resulting in battery being achieved just ahead of the striker impacting the primer?
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Old 10-31-2016, 01:07 PM   #87
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Chandler55, what model Sig are you asking about? This thread is addressing the 9mm model P938 and the 380ACP model P238.
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Old 11-01-2016, 02:35 PM   #88
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Originally Posted by chandler55 View Post
Now, for a technical question related to the MSH and auto fire condition. Does anyone know or has someone at Sig described the exact physical process taking place to allow the striker to ignite the primer? For example, is the striker actually getting held momentarily and the released because the sear spring is unable to hold it in position or is the striker actually slingshotting forward after the recoil compresses it and the slide moves faster than the striker resulting in battery being achieved just ahead of the striker impacting the primer?
Neither the P238 nor the P938 are striker fired pistols. They both have hammers which strike the firing pin. Pulling the trigger when the hammer is cocked releases the hammer.
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Old 11-17-2016, 12:28 PM   #89
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I finally had my P938 brought up to the latest iteration. It was just delivered to me by FedEx. The following parts were replaced: MSH, sear spring, sear pin and mag catch spring. The cost: $55 shipping (both ways) and service and parts were $25. I had sent the gun in with the original 6 round mag (only one was included when purchased new). When I unpacked the box there was two 6 round mags. I don't know why, but I guess that offsets some of my $80 cost for the updated parts and shipping charges. I'll get to the range soon to see if it works.
Update: I took the P938 to the range today to see if it still shoots as dependably as it did before I sent it to SIG for the new parts. Well it does. I am very pleased with the pistol and the SIG service I received.
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Last edited by red ryder; 11-18-2016 at 01:05 PM.
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