M&P9 "issue?"..or is this normal?

[jlott00]

shot a MP9 today and noticed that with the slide locked back. sliding in a full mag with normal force (make sure its in) the slide would release on its own ,chambering a round.

this seemed wrong to me, but i couldn't see to much of a negative.... it was faster.


is this normal for M&P's ?????

 

[The Lone Haranguer]

While mine (9mm compact, purchased 2006) didn't do this, it is common with a lot of pistols and doesn't hurt anything, but I would rather have more control over the process. Is the gun new, or a range rental? A rental gun will have had a lot of rounds put through it and there may be wear on the slide notch or slide stop.

 

[41magsnub]

My M&P 40 has done that since day 1. I decided it was a feature, not a bug.

 

[Ringer]

Never experienced that on my M&P 9F in about 1000 rounds.

 

[NG VI]

My USP does the same thing, nothing wrong with it, if I want it to not, all I have to do is seat the magazine gently. How often do you seat a loaded magazine and then not chamber a round, I mean besides theatrically?

 

[wow6599]

Never had that happen with 3 M&Ps in the past 4 years.........

 

[riseagainstforme]

Mine doesn't do that normally, but when I put the mag in under stress(quickly and with force) it does happen.

 

[Kingofthehill]

I have a few M&P's and i do have one that i can get to duplicate what you are describing if i REALLY slam that mag in there. I actually like it as a "Feature" now , LOL

JOe

 

[jlott00]

I dont have to slam the mag, just a normal "make sure its in there good tap"

I am gonna think it as a "feature" bc it is fast as hell, AS SOON as the mag is in there its chambered and ready to go boom......

 

[Manco]

My M&P40 has never done this, but I suspect that it would if I rammed the magazine in hard enough. That's probably true for most every pistol out there, and what I've also found is that with virtually every pistol design there are always some specific pistols that do it nearly all of the time with very little magazine insertion force. I guess something must be wrong with these pistols since they're not intended to operate in this manner, but as far as I know it's neither dangerous nor particularly uncommon. If a pistol of mine started doing this, I'd inspect it for wear or defects, and replace the associated parts if necessary, but I'm real conservative when it comes to how a gun functions.

By the way, here is what the M&P manual has to say on the subject:

WARNING: DO NOT USE EXCESSIVE UPWARD FORCE
WHEN INSERTING A LOADED MAGAZINE INTO THE
PISTOL. EXCESSIVE UPWARD FORCE COULD CAUSE
THE SLIDE TO MOVE FORWARD, CHAMBERING A ROUND AND
MAKING THE PISTOL READY TO FIRE.

 

[Jeb21]

I have the M&P 9 and the M&P 45, both do it when I put the new mags in with any degree of force.

 

[Fisherdave10]

My buddy's M&P40c chambers a round every time the magazine is seated with force. To him it's a feature...

 

[Ringer]

I would be a little concerned with considering it a feature if it's doing it with not a lot of force. If it's releasing when it shouldn't who's to say it won't fail to lock the slide back on the last round. You could end up with an unloaded gun that you think is still ready to fire. Just a thought.

 

[RSVP2RIP]

I would not get to comfortable with that as a "feature". The one time you need to do a fast reload it won't go forward and there you are with an open action trying to pull the trigger.

 

[cemjr]

M&P is not the only brand that does this. My H&K P-30 also drops the slide when the mag is inserted (normal)

 

[tactidrool]

It's supposed to do that. I believe lots of guns are designed that way, so that if you put the mag in hard enough at a certain angle it will close the slide, which makes for a faster reload in a firing scenario. I've seen videos of other M&P owners talk about what a nice feature it is on their guns.

I know that the Mag-pull guys talk about that being a nice feature, and it's something to train for. Of course if the slide doesn't close automatically, just quickly rack it.

 

[9teenEleven]

From day one here on my M&P 9mm. I like it.

 

[Zundfolge]

Its not a "feature", but most semi auto pistols will do this if you slap the mag in hard enough.

I've seen it happen with most brands.

 

[P30shtr]

MANY autoloaders will do this as others have said. As far as a training/SD option, I dont think I would try to get used to it or use it over other methods- over the top slingshot. Sometimes it will happen, sometimes it will not. Do you wanna take that chance its gonna work ? I almost kind of feel its a bad habit to get into because in a SD situation you are going to do what you practice/are used to. If you do it at the range all the time because you're used to it/ "its a nice, easy feature", guess what you're gonna do when its crunch time. My thoughts.
P30

 

[bruzer]

This is why you need to properly train with the pistol you own. As we see some people say "It is a feature of the M&P" and some say "It is not a feature of the M&P". The guy at my local gun store showed me that the M&P he was selling would do that and make magazine changes faster.
SO I REPEAT, "This is why you need to properly train with the pistol YOU OWN".
It is great to have a general idea of many characteristics of different pistols but more important is to have the training and muscle memory with the gun YOU USE.
This is only an opinion and in no way a reflection of any real knowledge.
Mike

 

[dpart77]

I like the feature when I shoot IPSC. My M&P 9 has done it from day one.

 

[dcmdon]

My Glock 34 has done this since new. I like it as it makes for faster reloads. No round counting in IDPA, sometimes the course requires you to go to slidelock. So this is a help. Especially since Im left handed and have to overhand the slide rather than just pushing the release.

 

[TechBrute]

I do it on purpose with my Glocks. It is done by pushing up and forward on the base of the magazine when seating it.

Also, In the Magpul Dynamics DVD, Art of the Dynamic Handgun, Travis Haley shows it as a technique for speeding up a reload.

 

[Manco]

It's supposed to do that.

That's not what the warning in the M&P manual implies.

 

[Paladin38-40]

LETC experience

Our GLOCK 23's do the same thing - sometimes. That is not a "feature" to count on, but not a problem either. We have observed the GLOCK slide is more likely to jump forward if the muzzle is elevated at the time the magazine is inserted.