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Old 03-01-2016, 08:14 AM   #1
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Ultra Main Spring Housing

Hey guys, need some help. I bought 3 mainspring housings from "Fusion" 2 full size & 1 for my ultra Raptor. The 2 full-size went in the Raptors with no problem & everything functions as should.

However, the one for the Ultra, went in but something was not right and pushed up the safety nub on the right top of the frame and of course the slide would not go on. I took out the "new" mainspring housing and put the original back in. Everything worked great.

So took it all apart again and put the "new" one from fusion back in, same thing slide would not go on as if the grip safety was being pressed, but it wasn't.

Put the original back in and everything is good again.

I talked to Fusion about it and the tech there said to "bend" the sear spring a little. Doesn't sound like that is a good idea.

Anyone out there replace their Ultra Main spring housing with success and if so what brand?
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Old 03-01-2016, 08:20 AM   #2
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Gary, Insta-Gator, just went through this. What he did was to measure his original housing and the new one and found the new one was a bit thicker and needed to be filed down a hair.
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Old 03-01-2016, 10:46 AM   #3
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Originally Posted by Chuck43 View Post
Gary, Insta-Gator, just went through this. What he did was to measure his original housing and the new one and found the new one was a bit thicker and needed to be filed down a hair.
Chuck,

Thicker or taller? Mine goes in just fine, it just pushes the safety up to where the slide will not go on.
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When moving back to the USA after many years overseas I was asked,

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I said, "I will buy a gun."

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Old 03-01-2016, 11:40 AM   #4
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I believe his was a wee bit too thick, your best bet would be to measure the original and compare it to the new one.
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Old 03-01-2016, 02:45 PM   #5
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Mine was on a Pro Raptor, not an Ultra.

Put the two MSH on a flat surface side by side. Look carefully and compare. Is the thickness to the inside of the slot the same? Are the side by side profiles the same? Not bumping the grip safety in any way?

Based on what the tech told you, sounds like the thickness between the leaf spring and the installation slot may be slightly thicker, which would push down on the leaf spring.
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Old 03-01-2016, 03:04 PM   #6
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Originally Posted by Insta-Gator View Post
Mine was on a Pro Raptor, not an Ultra.

Put the two MSH on a flat surface side by side. Look carefully and compare. Is the thickness to the inside of the slot the same? Are the side by side profiles the same? Not bumping the grip safety in any way?

Based on what the tech told you, sounds like the thickness between the leaf spring and the installation slot may be slightly thicker, which would push down on the leaf spring.
Gator,

Thanks, that sounds logical now. I sold it to a friend, but will order another and I am sure now I can get it to work.

I was featuring the spring pushing too hard on the safety pin. Now I see how being too thick would push the who sear spring too much.
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When moving back to the USA after many years overseas I was asked,

"What is the 1st thing you will do?"

I said, "I will buy a gun."

Asked, "Why"

My answer, "Because I can!!!!"

Last edited by HiddenPuppy; 03-01-2016 at 07:52 PM.
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