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Old 10-04-2018, 04:34 PM   #11
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Tommy b, google Wolff reduced power Colt Mustang Sig P238 hammer spring.

My Micro 9 with stock springs is currently averaging about a 5.2 to 5.4 pound trigger pull.

Last edited by JimCunn; 10-04-2018 at 05:01 PM.
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Old 10-05-2018, 09:57 AM   #12
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Originally Posted by tommy b View Post
Sounds like what I might be looking for. Do you have a part number or other definitive description that I could look into? Thanks.
Sorry, don't have a p/n, just what I posted. It should not be hard to find a Colt p/n though if one looks about.

Do know though, that if you replace that spring, you will most likely void the Kimber warranty. (I kept my OEM spring just in case....)
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Old 10-05-2018, 11:46 AM   #13
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Wolff P/N 31420 for a Colt Mustang and Sig P238. 20 Lb spring.
Though you don't need the # to order one.
They typically cost about $8 on ebay.

Last edited by JimCunn; 10-05-2018 at 11:51 AM.
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Old 10-05-2018, 11:49 AM   #14
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Originally Posted by Rick in Oregon View Post
Do know though, that if you replace that spring, you will most likely void the Kimber warranty.
I would keep my original spring and if the gun should go back to Kimber for other reasons, it definitely would have the original spring in it. Thanks.

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Old 10-05-2018, 11:53 AM   #15
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Originally Posted by JimCunn View Post
My Micro 9 with stock springs is currently averaging about a 5.2 to 5.4 pound trigger pull.
How many rounds have you run through it and have you done any work to reduce trigger pull?

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Old 10-05-2018, 12:37 PM   #16
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Not many rounds, and no work yet to reduce pull.
I'd like to get the pull down to about 4.5

I have a skeletonized trigger and reduced power hammer and trigger springs, but haven't installed them yet.

Last edited by JimCunn; 10-05-2018 at 12:44 PM.
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Old 10-05-2018, 02:46 PM   #17
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I'm really curious about what the OP (RetiredGunsmith) has to say about his plans having gotten some constructive suggestions in the thread.
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Old 10-05-2018, 04:26 PM   #18
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Originally Posted by Bigdog View Post
I'm really curious about what the OP (RetiredGunsmith) has to say about his plans having gotten some constructive suggestions in the thread.
Me as well. He may have sold it and moved on.
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Old 10-07-2018, 07:44 AM   #19
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I'm 76 with severe arthritis everywhere in my body. I've had shoulder, knee and hip replacements and my fingers look like crooked sticks. I sold my Ruger SR9C which I loved cause I could hardly rack the slide. My Micro 9 is a piece of cake to rack. The trigger pull when new was around 7 pounds but after around 450 rounds, about 4.5 pounds and a pleasure to shoot. I love it!!!

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Old 10-07-2018, 09:30 AM   #20
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Originally Posted by SargeUSA View Post
I'm 76 with severe arthritis everywhere in my body. I've had shoulder, knee and hip replacements and my fingers look like crooked sticks. I sold my Ruger SR9C which I loved cause I could hardly rack the slide. My Micro 9 is a piece of cake to rack. The trigger pull when new was around 7 pounds but after around 450 rounds, about 4.5 pounds and a pleasure to shoot. I love it!!!

Sarge (John)
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Agree Sarge...I "sold" my Ruger SR9c to my 30 year old son for the same reason. I'm sure my check is in the mail
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