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Author Topic: M&P 38 spl trigger dosen't return  (Read 1133 times)

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Offline slimjlm

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M&P 38 spl trigger dosen't return
« on: February 18, 2011, 08:19:02 AM »
I have a S&W M&P 38spl (K frame) with the hammer block in the side plate that came in for repair missing a few parts, namely cylinder stop spring & plunger, rebound spring, and side plate screws.  Got replacements for these from GPC and installed them, but the trigger doesn’t return.  The trigger appears different from the others I’ve seen as it has only two holes near the pivot point, one for the pivot and the other for the hand lever, but not one for the hand lever spring.  It also does not have a vertical hole in the trigger for a hand lever spring either.  The trigger won’t return even if you relieve pressure on the rebound slide by retracting the hammer slightly.  Haven’t tried live fire yet.

I see no place for a trigger return spring, what am I missing?!?!?






Thanks for the help, you guys are the best!!
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Offline gunnut69

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Re: M&P 38 spl trigger dosen't return
« Reply #1 on: February 20, 2011, 12:10:00 PM »
The link below should take you to a parts blow up. I can't see the trigger lever in it's spot at the rear of the trigger boss?(#70)? If it's gone that would likely be the problem? You might also check for a bent sideplate causing binding. The remnants of blue left in the cylinder flute really bring home the lovely finish these old S&W's had!   
http://stevespages.com/ipb-sandw-general.html
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gunnut69--
The 2nd amendment to the constitution of the United States of America-
"A well regulated militia, being necessary to the security of a free state, the right of the people to keep and bear arms, shall not be infringed."

Offline slimjlm

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Re: M&P 38 spl trigger dosen't return
« Reply #2 on: February 20, 2011, 02:56:30 PM »
The trigger link is there and looks to be in fine shape.  Is the pressure from the rebound slide the only thing that returns the trigger? 
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Offline gunnut69

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Re: M&P 38 spl trigger dosen't return
« Reply #3 on: February 20, 2011, 10:53:40 PM »
Yes sir! It's the reason the rebound spring is a balancing act..Too light = slugish trigger return, to heavy and pull weight goes up..
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gunnut69--
The 2nd amendment to the constitution of the United States of America-
"A well regulated militia, being necessary to the security of a free state, the right of the people to keep and bear arms, shall not be infringed."

Offline slimjlm

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Re: M&P 38 spl trigger dosen't return
« Reply #4 on: February 21, 2011, 04:18:08 AM »
Very good, I'll try swaping the rebound spring out for a stronger one and verifying that it slides well.  It is always possible that GPC sent a bad or wrong replacement spring, I'm about ready to stop getting springs from them and go directly for new Wolff on all my replacements... 

Thanks Gunnut!!!
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Offline gunnut69

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Re: M&P 38 spl trigger dosen't return
« Reply #5 on: February 21, 2011, 08:27:35 AM »
Does it lock when worked with the sideplate off? If so one should be able to watch the procedings so to speak and locate the problem.. Check the hand for clear passage in the slot and the cylinder for it's interface with the hand.  Be certain the hammer clears the locking bolt.. Might also check to be certain the trigger nose (front) is lifting (releasing) the cylinder stop. I would avoid snapping the gun with the sideplate off. It shouldn't create a problem but older S&W hammer studs(especially SS) can crystalize..   Alsp I did look at the parts blow up and the trigger is certainly oddly shaped.  If you look at the parts diagram for a M19 the triggger is very like yours..  Pay close attention to the action of the cylinder lock and it's interface with the trigger..  Don't forget to check the bolt clearance although that usually precludes movement of the entire action.  Look at teh rebound slide to see if it's been modified or is shorter..?
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gunnut69--
The 2nd amendment to the constitution of the United States of America-
"A well regulated militia, being necessary to the security of a free state, the right of the people to keep and bear arms, shall not be infringed."

Offline slimjlm

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Re: M&P 38 spl trigger dosen't return
« Reply #6 on: February 21, 2011, 10:17:50 AM »
I put a heavier spring in it and it's better, but still doesn't return all the way.  The one GPC sent me is no where near enough, more like a pen spring....  Going to get the right set from Wolff (#16660) and call it good.  All the mechanism and lockwork are fine, smooth and everything.  It doesn't appear to be modified at all, can still see casting/forging/machining marks on most all of it.  With the heavier spring the pull is still only about 8lbs, so should be able to go to 10 or 12 max to get reliable and not too bad of a pull for an old revolver. 

Thanks gunnut, I'll post when the springs come in
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Offline slimjlm

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Re: M&P 38 spl trigger dosen't return
« Reply #7 on: February 28, 2011, 04:15:29 PM »
Installed the 13# spring out of the kit and it returns nicely and functions great. 

Thanks for the help Gunnut, much appreciated
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