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Alternative to reduced power hammer spring

Moderators: ripjack13, John A.

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.22LR
Posts: 18
Joined: Sun Jun 18, 2017 7:24 pm
PostPosted: Tue Nov 14, 2017 7:46 pm
Here's something that can be done as an alternative to replacing the hammer spring. I machined a new spring seat that is (edit to 1.5mm) shorter above the retaining pin. It didn't make a big drop in trigger pull weight but a noticeable one and did do what I hoped it would. It eliminated that harsh spring stack during the last 20% of travel. I don't have a trigger pull gauge that goes that high but when I get one I'll test the difference between new and original. I also drilled and tapped it so I could thread in a 3mm bolt to use as a handle for install, made it much easier.

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Last edited by funflyer on Tue Nov 21, 2017 8:35 pm, edited 1 time in total.

.410
Posts: 35
Joined: Mon Jan 23, 2017 9:28 pm
PostPosted: Sun Nov 19, 2017 9:47 pm
Let us know how it works out.
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.22LR
Posts: 18
Joined: Sun Jun 18, 2017 7:24 pm
PostPosted: Mon Nov 20, 2017 5:32 pm
boscobarbell wrote:Let us know how it works out.


I have another pull gauge coming this week so I will do a comparison and report back.

In the mean time I took it to the range today for its first run and must say this pistol is fantastic. The long trigger pull is a non issue. Fired 100 rounds of target ammo, Remington and Perfecta and also 12 rounds of Ruger ARX. I can tell you that this pistol is as accurate as both my Shield 9 and 45 and just as much fun.

Here's the target from the very first 18 rounds. 6" target @ 10 yards.
First 6 I fired using the flush mag and were a bit all over the place but the next 12 were fired using the pinky extension mag for better control.

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.22LR
Posts: 18
Joined: Sun Jun 18, 2017 7:24 pm
PostPosted: Tue Nov 21, 2017 8:30 pm
Okay, so I did some testing today and here are the results.

I made two hammer spring seats, one was 1.5mm shorter and the other 2mm shorter than the stock plastic seat.

Stock out of the box, trigger pull was 8 pounds, 10 ounces.

With the 1.5mm shorter seat installed, trigger pull - 7 pounds, 12 ounces. This is the one that was test fired from the above post. 112 rounds with no fails of any kind.

With the 2.0mm shorter seat installed, trigger pull - 7 pounds, 7 ounces. Not test fired yet.


Here's a pic of the new and stock original for comparison in relation to the retaining pin
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Finished to match the grip angle
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User avatar
.22LR
Posts: 18
Joined: Sun Jun 18, 2017 7:24 pm
PostPosted: Wed Nov 29, 2017 7:30 pm
Tested the 2mm short seat today. Fired 50 rounds of Perfecta without any fails. Primer strikes look good. I checked the trigger pull again when I got home from the range and it was consistent at 7lb-6oz to 7lb-7oz.

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.22LR
Posts: 27
Joined: Thu Aug 03, 2017 4:38 pm
Location: Garnet Valley, PA 19060
PostPosted: Thu Nov 30, 2017 1:02 pm
Very impressive work. I had to do a spring change or get the machine and tools to make my own. No doubt what was less expensive as a solution. Still, I was fascinated by your conceived solution and work.
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.22LR
Posts: 18
Joined: Sun Jun 18, 2017 7:24 pm
PostPosted: Thu Nov 30, 2017 9:33 pm
Richardw wrote:Very impressive work. I had to do a spring change or get the machine and tools to make my own. No doubt what was less expensive as a solution. Still, I was fascinated by your conceived solution and work.


Thanks Richard,
Another option would be to simply sand/file down one side of the factory seat. Even though the seat is plastic the steel retaining pin is taking most of the pressure. The seat is double sided so in case of a screw-up it can be reversed, no harm no foul. The aftermarket SS seat can also be modded the same way.

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