M&P 9mm Sear deactivation

[patrickm1587]

I read in my book where it says that you need to lower the sear deactivation while stripping the M&P. I've done this, and it doesn't do anything, I still have to pull the trigger to get the slide assembly off the frame.

 

[Wee Hooker]

As I recall ( as I just did this 10 min ago), your supposed to pull the trigger, drop the mag, lock the slide rearward , lower the sear lever, lower the takedown lever and finally release the slide to allow it to slide off the forward end of the gun. I can tell you (learned when I did my trigger work) that the sear lever definitely lowers the sear so it doesn't catch the striker.

 

[patrickm1587]

As I recall ( as I just did this 10 min ago), your supposed to pull the trigger, drop the mag, lock the slide rearward , lower the sear lever, lower the takedown lever and finally release the slide to allow it to slide off the forward end of the gun. I can tell you (learned when I did my trigger work) that the sear lever definitely lowers the sear so it doesn't catch the striker.

Wouldn't pulling the trigger at the beginning be just the same as if you pulled it to release the slide?

 

[RogueJSK]

Pulling the trigger before you lock the slide back would be pointless, as pulling the slide rearward to lock it back with the slide release would re-cock the striker. You would still be required to pull the trigger again, or drop the sear lever.

To the OP: make sure the sear lever is all the way down, nearly perpedicular with the magwell. Otherwise, the sear isn't fully disengaged. I made that mistake the first time I tried to disassemble my M&Pc with the sear lever.

But frankly, I find simply pulling the trigger to be the easiest. As long as you triple check that the chamber is empty, which you should be doing anyway, it's not an issue. The sear lever was added to placate all the various lawyers and administrators who claim pulling the trigger on a Glock to disassemble it is a safety hazard. It really isn't, though... If there are any negligent discharges during disassembly, from pulling the trigger on a loaded chamber, it's due to a failure or shortcoming in training.

 

[patrickm1587]

Ok so even when you let the sear deactivator down, you still have to pull the trigger to let the slide off? Does letting it down just keep the sear from hitting the striker when you pull the trigger to let the slide off?

 

[RogueJSK]

No. Dropping the sear lever all the way down removes the need to pull the trigger.

So you have a choice to either drop the lever, or forget the lever altogether and simply pull the trigger.

 

[patrickm1587]

Ok well when mine is dropped all the way down it doesn't do anything. The slide still won't come off unless you pull the trigger. I can hear it click slightly when I let it down though.

 

[WR Moore]

The M&P sear release lever was designed to avoid having to pull the trigger to strip the weapon. Thereby preventing the perforation of many objects by "unloaded guns". If your pistol won't strip the slide cleanly with the sear release lever all the way forward and down, call S&Ws Customer Service Deparment immediately.

BTW, you do have to hold the slide release lever in the down position to remove the slide.

 

[patrickm1587]

Well I figured out that I was actually pushing the sear level too far down some how. It doesn't actually go all the way down, it just moves down a little bit on mine and it works.

 

[EOD Guy]

I have never done anything other than drop the magazine, lock the slide back, move the sear lever down, rotate the take-down lever, release the slide and the slide has always easily come off the frame... just like the Instruction Manual tells you to do.

 

[ab4ka]

I lock the slide, drop the mag, push down the sear deactivator lever, rotate the take-down lever the ease down the slide stop while holding the slide in place and she slides right off. My only complaint is that my fingers are too fat to get to the sear lever, I have to stick something in there. I try to avoid using the backstrap pin as I figure removing that too many times will eventually result in it's failure to lock in place.

 

[DrMark]

...I find simply pulling the trigger to be the easiest. As long as you triple check that the chamber is empty, which you should be doing anyway, it's not an issue.

Same here. I'm used to doing it with Glocks anyway.

 

[shawn mccarver]

As I recall ( as I just did this 10 min ago), your supposed to pull the trigger, drop the mag, lock the slide rearward , lower the sear lever, lower the takedown lever and finally release the slide to allow it to slide off the forward end of the gun. I can tell you (learned when I did my trigger work) that the sear lever definitely lowers the sear so it doesn't catch the striker.

NO. One of the advantages of the S&W M&P is that it can be disassembled WITHOUT pulling the trigger.

Lock slide to rear, rotate disassembly lever, use the supplied tool or the tip of a Bic Pen or similar instrument to push the sear deactivation lever down as far as it will go, then carefully release the slide and ease it forward and off the frame.

 

[Kazo]

Sear deactivation lever

Just brought a M&P 9 home and was wondering about this little thing. The S&W manual does a poor job in explaining this lever. They don't tell you what it does or what it's purpose is. Since I consider myself fairly intelligent, this thing doesn't really do anything at all. I re-assembled it and broke it down the same way as a Sigma--and it works the same. Plus, on my M&P, getting the frame tool out requires some tough fingers.

 

[markush]

Guys, you can stick your finger in and catch the sear release with your nail (I use my pinky). There is no need to use the take down tool. If your stubbies fit use em.

 

[Capt Steve]

I have never done anything other than drop the magazine, lock the slide back, move the sear lever down, rotate the take-down lever, release the slide and the slide has always easily come off the frame... just like the Instruction Manual tells you to do.

This has always worked for me. One of the advertised safety features of the MP's is the ability to breakdown/strip the gun without pulling the trigger. If your MP can't be taken down without pulling the trigger send it back to Smith as something is wrong.