Trigger safety tab catching. - MP-Pistol Forum

Trigger safety tab catching.

This is a discussion on Trigger safety tab catching. within the MP Gunsmithing forums, part of the Smith & Wesson MP Forum category; Hello, I recently did some work on my shield. - replaced the sear with the Apex sear - used Eezox dry lube on all internal ...


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Old March 20th, 2016, 02:42 PM   #1
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Trigger safety tab catching.

Hello,

I recently did some work on my shield.

- replaced the sear with the Apex sear
- used Eezox dry lube on all internal metal parts
- polished the trigger bar
- replaced sights

All springs are original.

No parts were "filed" or modified, only polished with rouge and a felt wheel or 3000 grit stone.

However upon reassembly, I noticed the trigger safety is hitting the frame every so often.

I never noticed this issue before the work.

I assume this is due to the fact that the trigger is now smoother which results in a lighter trigger [desired ], and the trigger moves before the blocking tab is disengaged.

Yes, when I hold lower on the trigger it functions reliably, but is a SD situation, I doubt I will remember.

Possible remedies:
- heavier trigger return spring.
- lighter trigger safety spring ??
- light filing on the blocker tab
- I don't want to purchase a new trigger.

...any thoughts on how to remedy this?

Thanks.
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Old March 20th, 2016, 07:31 PM   #2
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Quote:
Originally Posted by Jacksnack View Post
Hello,

I recently did some work on my shield.

- replaced the sear with the Apex sear
- used Eezox dry lube on all internal metal parts
- polished the trigger bar
- replaced sights

All springs are original.

No parts were "filed" or modified, only polished with rouge and a felt wheel or 3000 grit stone.

However upon reassembly, I noticed the trigger safety is hitting the frame every so often.

I never noticed this issue before the work.

I assume this is due to the fact that the trigger is now smoother which results in a lighter trigger [desired ], and the trigger moves before the blocking tab is disengaged.

Yes, when I hold lower on the trigger it functions reliably, but is a SD situation, I doubt I will remember.

Possible remedies:
- heavier trigger return spring.
- lighter trigger safety spring ??
- light filing on the blocker tab
- I don't want to purchase a new trigger.

...any thoughts on how to remedy this?

Thanks.

"light filing on the blocker tab" would be my fix if I had the problem.
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Old March 21st, 2016, 07:11 AM   #3
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"light filing on the blocker tab" would be my fix if I had the problem.
What he said!
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Old March 21st, 2016, 09:58 AM   #4
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Welcome to the Neighborhood!
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Old March 21st, 2016, 11:34 AM   #5
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If I understand you correctly, my M&P Pro 9mm did the same thing, that is the tab on the back of the trigger (safety) slightly bumped on the opening in the frame as I pulled the trigger. I could still pull the trigger, but the slight "bump" I felt was annoying. I only had to do a light filing to get it to stop touching, and it didn't affect the purpose of the trigger safety.

And welcome to the forum from Texas!
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Old March 21st, 2016, 12:36 PM   #6
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Thanks...

Thank you all for the warm welcome. Other forums were less than enthusiastic...

Some lambasted me for working on my firearm.

Yes, Ag76, it is the exact same problem, but now that the trigger is lighter, the safety does not want to disengage freely.

I hope to get a heavier trigger return spring, but Apex won't sell that part individually.

If I can't find a heavier TRS, I'll lightly file.
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Old March 21st, 2016, 12:42 PM   #7
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Quote:
Originally Posted by Ag76 View Post
If I understand you correctly, my M&P Pro 9mm did the same thing, that is the tab on the back of the trigger (safety) slightly bumped on the opening in the frame as I pulled the trigger. I could still pull the trigger, but the slight "bump" I felt was annoying. I only had to do a light filing to get it to stop touching, and it didn't affect the purpose of the trigger safety.

And welcome to the forum from Texas!
I had a similar issue after installing APEX Comp Kit in a CORE. I did not want to file the tab. Apex sent me another USB and that solved the issue. I think the CORE requires a slightly longer USB (or maybe just the spring). Without this, it throws timing off just enough as there is not enough resistance in the trigger pull to hinge the trigger before the USB spring pressure comes into play.

Welcome to the forum.
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Old March 21st, 2016, 12:44 PM   #8
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Thanks all for the advice!
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Old March 21st, 2016, 12:56 PM   #9
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Mine started bumping after I installed the Comp Kit also, so I think you're right about what caused the issue.

Quote:
Originally Posted by lhawkins View Post
I had a similar issue after installing APEX Comp Kit in a CORE. I did not want to file the tab. Apex sent me another USB and that solved the issue. I think the CORE requires a slightly longer USB (or maybe just the spring). Without this, it throws timing off just enough as there is not enough resistance in the trigger pull to hinge the trigger before the USB spring pressure comes into play.
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Old March 22nd, 2016, 09:13 PM   #10
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[QUOTE=lhawkins;436075]I had a similar issue after installing APEX Comp Kit in a CORE. I did not want to file the tab. Apex sent me another USB and that solved the issue. I think the CORE requires a slightly longer USB (or maybe just the spring). Without this, it throws timing off just enough as there is not enough resistance in the trigger pull to hinge the trigger before the USB spring pressure comes into play.

I have the same problem with the Comp AEK in my Pro Series 5" (non-CORE) and would rather not file the tab or frame as others have done. I called and asked about a lighter trigger safety spring, or some other suggestion. The lady was going to check with someone else and call me back - the day before yesterday - but hasn't yet. Is there someone at Apex I should ask to speak with that would know about this problem? I need a fix from Apex or will reinstall the factory trigger return spring before a match in 10 days. Thanks in advance!
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Old March 23rd, 2016, 01:06 PM   #11
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[QUOTE=Cosmo71;436111]
Quote:
Originally Posted by lhawkins View Post
I had a similar issue after installing APEX Comp Kit in a CORE. I did not want to file the tab. Apex sent me another USB and that solved the issue. I think the CORE requires a slightly longer USB (or maybe just the spring). Without this, it throws timing off just enough as there is not enough resistance in the trigger pull to hinge the trigger before the USB spring pressure comes into play.

I have the same problem with the Comp AEK in my Pro Series 5" (non-CORE) and would rather not file the tab or frame as others have done. I called and asked about a lighter trigger safety spring, or some other suggestion. The lady was going to check with someone else and call me back - the day before yesterday - but hasn't yet. Is there someone at Apex I should ask to speak with that would know about this problem? I need a fix from Apex or will reinstall the factory trigger return spring before a match in 10 days. Thanks in advance!
Welcome to the Neighborhood!
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Old March 24th, 2016, 12:50 PM   #12
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A heavier spring fixed the issue.
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Old April 2nd, 2016, 10:00 PM   #13
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I had the same problem when I installed the Apex M&P Duty/Carry Action Enhancement Kit. When reassembling make sure you push the trigger up and forward towards the muzzle. Basically your trigger is not forward enough for the tab to clear the frame.

Mike
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