mp40 external/internal safety

lorcin25 · 02-24-2008, 12:53 PM

I just purchased a mp40 and I saw in the manual where toward the rear of the gun there is an optional internal lock. What is that? The only thing I don't like about this gun is there is no external safety. I have heard they can be put in. Any help? Can I put one in myself? Please help!!

Bravo · 02-25-2008, 05:29 PM

If you look near the rear of the slide, you will see a spot that an external safety will be able to be installed. As of now, the parts to do this do not exist. S&W just released 9mm and .40 models at the SHOT show that will have external safeties.

The internal lock is a device that disables the trigger. Mine has a spot for the key, but doesn't have the lock equipped. I'm guessing that you're probably in the same boat. I do believe that these can be installed. Google for some M&P forums, I think you will be able to find good info there.

EDIT: I looked at some other forums and I couldn't find any info. The internal lock was designed because some states require that your handgun has a safety of some sort.

The fact that the M&P has no safeties except a trigger safety doesn't bother me. It's designed to be carried loaded, very much like a Glock. If I really wanted an external safety, the .45 M&P was available, or I could have gone the route of a Beretta 92 or M1911.

vel525 · 02-26-2008, 09:29 PM

i inquired with s&w about when they expect to put the external thumb safeties on the 9mm and .40. according to the rep, they hope to be making it a factory option by mid year.

lorcin25 · 02-26-2008, 10:25 PM

Quote:

Originally Posted by vel525

i inquired with s&w about when they expect to put the external thumb safeties on the 9mm and .40. according to the rep, they hope to be making it a factory option by mid year.

Will it be something that can be added on to the older models?

Bravo · 02-27-2008, 10:11 AM

I was wondering that. If you look at your model, there is a small square indent right about where a thumb safety would go. I'm thinking that we might be able to add these, although I'm definitely not certain.

Worst case, it gives me an excuse to get another M&P in a 2nd caliber/size

vel525 · 02-27-2008, 09:17 PM

Quote:

Originally Posted by lorcin25

Will it be something that can be added on to the older models?

I never asked them that.

02-24-2008, 12:53 PM	#1 (permalink)
lorcin25 Senior Member Join Date: Jul 2007 Posts: 249	mp40 external/internal safety I just purchased a mp40 and I saw in the manual where toward the rear of the gun there is an optional internal lock. What is that? The only thing I don't like about this gun is there is no external safety. I have heard they can be put in. Any help? Can I put one in myself? Please help!!

02-25-2008, 05:29 PM	#2 (permalink)
Bravo Senior Member Join Date: Sep 2005 Location: Maine, USA Posts: 1,596	If you look near the rear of the slide, you will see a spot that an external safety will be able to be installed. As of now, the parts to do this do not exist. S&W just released 9mm and .40 models at the SHOT show that will have external safeties. The internal lock is a device that disables the trigger. Mine has a spot for the key, but doesn't have the lock equipped. I'm guessing that you're probably in the same boat. I do believe that these can be installed. Google for some M&P forums, I think you will be able to find good info there. EDIT: I looked at some other forums and I couldn't find any info. The internal lock was designed because some states require that your handgun has a safety of some sort. The fact that the M&P has no safeties except a trigger safety doesn't bother me. It's designed to be carried loaded, very much like a Glock. If I really wanted an external safety, the .45 M&P was available, or I could have gone the route of a Beretta 92 or M1911. Last edited by Bravo; 02-25-2008 at 05:33 PM.

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02-26-2008, 09:29 PM	#3 (permalink)
vel525 Registered User Join Date: Jan 2008 Posts: 13	i inquired with s&w about when they expect to put the external thumb safeties on the 9mm and .40. according to the rep, they hope to be making it a factory option by mid year.

02-27-2008, 10:11 AM	#5 (permalink)
Bravo Senior Member Join Date: Sep 2005 Location: Maine, USA Posts: 1,596	I was wondering that. If you look at your model, there is a small square indent right about where a thumb safety would go. I'm thinking that we might be able to add these, although I'm definitely not certain. Worst case, it gives me an excuse to get another M&P in a 2nd caliber/size