Flat wire recoil spring? - Kimber Forum

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Old 03-04-2020, 12:46 PM   #1
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Flat wire recoil spring?

Is there any advantage to replacing the stock Kimber recoil spring with a flat wire with equivalent spring weight?
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Old 03-04-2020, 01:11 PM   #2
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If you are referring to one of the two Micros that's a definite yes if you haven't already. On the other larger pistols I will let someone else comment.
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Old 03-04-2020, 02:14 PM   #3
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The spring life is much longer with a flat wire spring.
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Old 03-04-2020, 04:04 PM   #4
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A flat wire recoil spring in a 4" or 5" 1911 will be good for about 40,000 rounds and most shooters will never have to change it again. The round wire spring that Kimber sells is is good for about 800 rounds. The other advantage of the flat wire spring is that you won't need a tool to break the gun down, you can do it with just your two hands.
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Old 03-04-2020, 07:20 PM   #5
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Just put a Wilson combat in a 45 acp Pro today. Headed to the range to test it tomorrow. I'll say 3 things about installing it.
#1 there website has the wrong install instructions.
They show a pin hole in the guide rod that doesn't exist anymore.
#2 installing a 5 13/16" long spring where a 3 1/4" spring used to live is a stone bitch.
Make sure you're in a box with safety glasses on because things are going to fly.
#3 Wilson's tech support is great.

Opening the slide is much harder with the 22# spring than is was with the Kimber spring with over 1k rds on it.
We'll see tomorrow how it operates.
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Old 03-05-2020, 04:55 AM   #6
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Originally Posted by OldGrey1911 View Post
Is there any advantage to replacing the stock Kimber recoil spring with a flat wire with equivalent spring weight?
As has been mentioned the lifespan is advertised as 10x that of stock. Keep in mind you'll generally need to get a "kit", it comes with a new guide rod and sometimes plug, sometimes a buffer. Be sure to get the EXACT products for your gun to ensure proper function and fit.
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Old 03-05-2020, 05:39 AM   #7
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The factory spring in my Pro was crap. Looked like something tossed into the 10cent bin at Ace Hardware. I could ease the slide forward and it would grind, stick and stop before going into battery. On the advice of Chuck and others here at KT, I purchased a Wilson Combat flat wire kit. WC really drives the slide home with authority smooth as glass.

Below for comparison factory/Wilson

pic of 2002 Pro<->Tactical SE. Precursor to the Tactical Pro.
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Last edited by ChattanoogaPhil; 03-05-2020 at 06:47 AM.
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Old 03-05-2020, 07:23 AM   #8
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Agreed the factory spring was unimpressive to say the least. Immediately ordered and installed a Wolff 23# spring for Kimber and I am still using it without any issue about 1800 rounds later.

I was intending to upgrade to the Wilson kit at some point but the Wolff works so well I haven't. At 7 bucks each I just bought two so still have one on deck.

The take down on the bull barrel Kimbers is annoying no doubt.
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Old 03-05-2020, 07:59 AM   #9
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Have any of you put a flat wire spring in the Ultra? I have been considering this. I put over 650 rounds through my ultra CDP last Saturday. I wanted to make sure it was broke in well and reliable.
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Old 03-05-2020, 09:05 AM   #10
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I don't know of anyone that makes a flat wire spring assembly for the Ultra that works. The Ultra uses a dual recoil spring assembly, Kimber recommends replacing it every 1800 rounds. At 1800 rounds you can replace the outer spring at 3600 you need to replace both springs. Changing those springs is not for the faint of heart, if you send the assembly in to Kimber they will install them for you.
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