Installing thumb safety

This is a discussion on Installing thumb safety within the MP Talk forums, part of the Smith & Wesson MP Forum category; Can i have a thumb safety installed on this M&P that did not originally come with it?(9mm) It's the newer range kit. C&D wasnt sure ...


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Old April 24th, 2011, 04:54 AM   #1
 
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Can i have a thumb safety installed on this M&P that did not originally come with it?(9mm) It's the newer range kit. C&D wasnt sure themselves. Any thoughts?
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Old April 24th, 2011, 06:32 AM   #2
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Unless the frame has the removable thumb safety plugs one will have to make cuts in the frame. The worst part is getting ones hands on a thumb safety sear housing block; no one has it for sale and S&W will not sell it. Having a 2nd M&P with a TS would be the best way or find someone willing to trade or sell the thumb safety sear housing block.



Best luck!
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Old April 24th, 2011, 04:19 PM   #3
 
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Jason,



I think hes asking because the newer range carry kits and the VTAC M&P 9mm and 40 guns that come without safeties HAVE the frame cutuots already.



I wouldnt be surprised if Smith is trying to standardize their lines and is simply shipping one frame type these days and perhaps one sear housing. It would certainly make sense.



The only thing that makes me pause and wonder is due to the fact that Smith is not immune to bonehead decisions. Plus, they still need to offer the sear housings with the internal locks.



Im curious about this also.
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Old April 25th, 2011, 04:14 PM   #4
 
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Anyone?
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Old April 25th, 2011, 06:20 PM   #5
 
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Try giving smith a call, they might have an answer for you.



If you call, let us know what they have to say.
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Old April 25th, 2011, 07:04 PM   #6
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Quote:
Originally Posted by Magsz View Post
Try giving smith a call, they might have an answer for you.



If you call, let us know what they have to say.


One answer has been given already.



Quote:
Originally Posted by Barracuda View Post
I know a lot of people here don't like the thumb safety but it would make me feel a lot better about having a chambered HD gun around my girlfriend. So I emailed S&W about adding one to my M&P 45fs.



My emails and replies



Hello,



I have a M&P 45FS model without the thumb safety and would like to change it. I would like to ether just buy the parts needed(preferably) or send it in to be added(if needed). Please let me know if ether is possible and if so how much would it cost.



Thanks for any and all help.



Hello,



Unfortunately it is not possible to retrofit a thumb safety on an existing gun. It can only be installed during the initial manufacturing process.



Regards,

Dave Valenze





Mr. Valenze,



First of all thank you for responding to my email in a timely matter. Second, I would appreciate it if you could elaborate on your answer. Because, from the M&P forums I have read it's not a matter if you can. It seems to be a matter of won't. From my understanding since my M&P already has the cutouts on the frame all I need Is the the thumb safety, spring, and one other piece that will fit into my existing sear block... Am I missing some technical reason or is it a policy/legal reason?



Hello,



The thumb safety can only be installed on the gun during the initial manufacturing process for legal reasons. The configuration of the pistol is linked to the serial number which is on file with the BATF. We are not allowed to change that configuration or sell the parts that would let someone else modify the pistol.



Regards,



Dave Valenze
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Old April 26th, 2011, 12:52 AM   #7
 
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I call BS on Dave Valenze's last comment....



While you do need the appropriate sear block to install a thumb safety, that "legal reason" comment seems specious....



I think their problem is that you would end up removing a Hilary Lock if one was present.... Not quite the same thing....



(The sear block for the thumb safety has a design that makes it impossible to install a Hilary Lock.... S&W just won't sell those guns in places where the lock has to be there....)



Otherwise, thinking about it, it's kind of silly to sell you a gun where the thumb safety can be removed in five minutes or so by anybody with an appropriate roll pin punch - in effect removing a safety feature - while not letting you install the same safety feature on a gun you bought without it for whatever reason....



Jason, I know you're aware of what I did - swapped the "grip" of a 9C with a thumb safety with a 40C without it. Essentially just exchanged slides, barrels, recoil springs, and magazines. But this happened because I had the 9C already. Damned expensive upgrade otherwise ....



Regards,
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Old April 26th, 2011, 04:41 AM   #8
 
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Jason,



That is one answer but it's not the answer to this particular question. IF the range carry kits have the correct sear housing they CAN accept a safety. Forget smiths lawyer drivel. I think asking smith which sear housing the new vtac and range carry kits come with is a reasonable question since they feature new frames with the cutouts.
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Old April 26th, 2011, 10:32 AM   #9
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I think the best thing S&W could do is make available all of the SHBs.
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Old April 26th, 2011, 06:33 PM   #10
 
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The real question is if you can add the parts and will it work on your existing pistol... He apparently avoided the question or you didn't word for his understanding. Let me know... tedious....
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Old April 26th, 2011, 07:33 PM   #11
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Quote:
Originally Posted by MaynardJamesKeenan View Post




Can i have a thumb safety installed on this M&P that did not originally come with it?(9mm) It's the newer range kit. C&D wasnt sure themselves. Any thoughts?
The flat dark earth frames have the plugs. So yes, you need the thumb safety, the spring and the detent. You can get thumb safeties from cane and derby. You can ask them about the other two parts.
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Old April 26th, 2011, 07:49 PM   #12
 
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Reiverman:



You also need a sear block that can accept the thumb safety cam follower.



It appears that you can't attach that part (actually a spring and a little widget) in the standard sear block....



Also, the thumb safety acceptable sear block has no provision for the Hilary Lock, which may be why S&W won't sell that block.



I don't know why they've got models out there with the square cutouts that won't accept the thumb safety....



(Especially since there's a plug that needs to be supplied, and the inventory issues that go with them.)



The funny thing (besides the Hilary Lock thing) is that the thumb safety is a trivially simple device - possibly an afterthought, but the cam follower and spring apparently couldn't be attached to the standard block. (In any case, it kills the Hilary Lock, too, but I think that could have been avoided by finding a way to put the cam follower on the other side of the sear block. The Hilary Lock really doesn't impinge on that side of the block at all - or something could have been designed to avoid the problem. Doesn't appear to be a choice on the lock side....)



Regards,
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Old April 26th, 2011, 08:59 PM   #13
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Quote:
Originally Posted by SMMAssociates View Post
You also need a sear block that can accept the thumb safety cam follower.


+1, and manual safety sear blocks are not yet available in the parts distribution chain. From the sounds of it they never will be (at least I'm not holding my breath).
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Old April 26th, 2011, 09:07 PM   #14
 
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KRWeiss:



I wonder about that.... Seems like there are enough PD's (and similar agencies) who bought the thumb safety to presume that some replacement sear blocks would be needed that included the thumb safety hardware....



The question is when, and who they'll sell 'em to.



I still see it as a hard to get item because of the temptation to remove the Hilary Lock ....



Regards,
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Old April 26th, 2011, 09:54 PM   #15
 
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damn that just sucks. If in fact the states here are valid. Maynardkeenan. if you still want the parts you're more than welcome.
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