M&P tap but no rack.

[thunderranch.45]

Just wanted to see if anyone else has ever had this issue with an M&P 9. Whenever i do a reload at slidelock i was trained to insert new mag and give it one or two quick blows with the heel of my hand to make sure the mag is properly seated in a high stress situation.Problem is when i do this with the M&P the slide cycle's into battery.Can't say i've ever had this happen with any other pistol's.Anyone got an idea what may be causing this or if anythings wrong at all. I can't believe this is normal and the pistol is totally stock with no mods.

 

[checkmyswag]

Search for "auto forward".

Nothing is wrong w it. Most consider it a feature. Some don't.

Only time I've ever had an issue was with only 10 rounds in the mag during IDPA. It didn't strip a round off as it compressed the mag spring.

Other than that I like it. Practice w it and practice if it fails.

 

[mgmorden]

Almost any gun will do this if you seat the mag firmly enough. The M&P does seem to do it with a little less pressure needed than some other guns though.

Overall, not a biggie. Just know that it might happen, but never rely on it. I shoot an M&P in USPSA and on the rare occasion that I shoot to slide-lock it has never been an issue.

 

[Skylerbone]

Not normal at all. Quit pounding your magazines in and the problem will cease to exist. The slide lock is engaged with spring pressure from contact with the magazine follower. At empty, the mag. spring pushes the follower up making contact with the slide stop lobe and in turn forcing it into the cutout.

Without a magazine inserted there is only friction between the slide and slide stop because of the recoil spring (attempting to close the action). Inserting a fresh (full) magazine with excessive force can, as in your case, jolt the slide lock free and allow the recoil spring to finish its job.

If the pistol is in good repair otherwise, seating it firmly, without repeated blows, will be enough.

 

[tonytuna]

my mp45c does it.. all m&p's do it from what ive read.
its considered a feature.
i like it.

 

[holdencm9]

I don't consider it a "feature" nor do I consider it a bad thing. My buddys' Glock 19s do the same thing. It's just because there is so little surface area on the slide lock and so little friction, the force of the tap causes it to disengage.

 

[1SOW]

CZ's do it. I would pay extra for the feature if it didn't do it.
It doesn't take slamming the mag to do it, just a correct/firm insert using the heel of your weak hand to seat the mag.. The top bullet in the mag (if it has a decent mag spring) will bump the slide off the slide stop.

My Sig will do it, with a firm mag insert. Many pistols will do it with varying mag-insert firmness.

 

[Shawn Dodson]

The slide on my Glock 19 will sometimes inadvertantly go into battery when I seat a magazine. I don't care. I simply "Roll & Rack" like I always do, and drive-on.

 

[Skylerbone]

[QUOTE The top bullet in the mag (if it has a decent mag spring) will bump the slide off the slide stop.][/QUOTE]

Which part of the top bullet in which pistol touches the slide on insertion? No, it's concussion that's tripping it, period. Listen and feel for it to catch, no need for repeatedly whacking it.

 

[Bozwell]

I have some guns that do this with even a moderate bump. Other guns, I'd really have to whack it to get it to release. The first time it happened it caught me off guard, but these days I've grown accustomed to it and have even come to like it.

 

[9mmepiphany]

First stop with the quick blows...it just makes you look OCD. Learn to just seat it correctly to start with. The only time I even check is after an administrative reload and all I do it tug on the base plate.

I have a M&P9 that I'm using for IDPA competition and it will release the slide to chamber a round whenever I insert a full magazine forcefully...I really like it because it always does it, unlike my Glock 19 or SIG 226.

It is more common in polymer framed guns due to the looser fit between the slide and the frame. The full magazine actually causes the slide to lift upwards when inserted. the inertial of the slide stop/catch, without the upward pressure of the magazine follower pushing it up, causes it to stay in place and disengage

 

[thunderranch.45]

Thanks 9mmepiphany now i know what the problem is,i'm OCD,and i don't even know how to seat a mag. I'll be sure to pass the info on to my RO. I can't believe all that time he spent training officers to save our's and others live's was really just to make us look stupid. I'll have to remember to tug on my baseplate after my next administrative reload before i engage the next cardboard threat. By the way i love the shooting sports but just because that's how you do it in IDPA does'nt make it right for all situations. Not all of us use a firearm for sport alone.

 

[9mmepiphany]

I don't think you should be offended by my pointing out that you were instructed in a poor technique. BTW: acting OCD isn't the same as looking stupid...they aren't related at all

What I'm recommending is a common technique taught by all top tier shooting schools in this country to competitors, LEOs (from street cops to SWAT/SERT guys) and to military Spec OP guys. I've used it with my duty, and off-duty, guns during my 28 year career.

I've even trained Ohio LEOs when Chris Cerino was in charge of OPOTA firearms training...I can't imagine he approved of the technique you were taught.

 

[LightningMan]

I have an M&P .40c and it does it, also have a Steyr M40 that does it, but my Sig 226 & Kimber 1911 have never done it. BTW I like it, and would prefer all my center fire pistols did this. LM

 

[Blackstone]

CZ's do it. I would pay extra for the feature if it didn't do it.
It doesn't take slamming the mag to do it, just a correct/firm insert using the heel of your weak hand to seat the mag.. The top bullet in the mag (if it has a decent mag spring) will bump the slide off the slide stop.

My Sig will do it, with a firm mag insert. Many pistols will do it with varying mag-insert firmness.

Yes I've noticed this on my CZ Shadow that sometimes the slide goes forwards on its own. I might do some experimentation to see how easy it is to reproduce. My only worry is that it will wear out the slide stop or spring.

 

[ny32182]

I happens on my M&P 9Pro with a pretty high degree of reliability. In the rare event it doesn't, just hit the slide catch.

I don't even have to pound it for it to work... it will go with moderate seating force at most.

In all the slidelock reloads I've done with this gun in 15.5k rounds of mostly IDPA (which is a lot) it has failed to strip a round exactly one time.

 

[Jim Watson]

I have seen a lot of people with Glocks and Plastic M&Ps so accustomed to the "auto load" characteristic that if the slide does NOT close upon seating a magazine, they thump the magazine again instead of going for the slide stop lever.


Now if they would just set one up to automatically drop an empty magazine like a Garand spits out an empty clip...

 

[AethelstanAegen]

Thanks 9mmepiphany now i know what the problem is,i'm OCD,and i don't even know how to seat a mag. I'll be sure to pass the info on to my RO. I can't believe all that time he spent training officers to save our's and others live's was really just to make us look stupid. I'll have to remember to tug on my baseplate after my next administrative reload before i engage the next cardboard threat. By the way i love the shooting sports but just because that's how you do it in IDPA does'nt make it right for all situations. Not all of us use a firearm for sport alone.

Sarcasm much? Ease up dude, 9mmepiphany gave you good advice (you asked about what you thought was a malfunction, but it's operator induced so the natural response is don't do it) if you don't want to take the advice, don't. It takes some real chutzpah to assume you're the only person here who uses a gun for more than paper punching.

There's more than one way to skin a cat and it never hurts to hear out and try other techniques, you might find you like them better and you can always go back to the old method. In this case, 9mmepiphany's advice will correct the perceived problem.

 

[TestPilot]

I find the "tap" or "slap" whatever technique to seat the magazine a deficient technique. You can tap and slap until your palm goes numb just to witness your magazine dropping to the ground after your first shot.

The reason is that no matter how hard the jab is, what locks the magazine in place is the magazine being inserted deep enough and staying there long enough for the magazine catch to engage it, and the tapping often does not ensure that the magazine is deep enough AND stays deep until the magazine catch engages securely. The pain in your palm is not a good indicator of that.

I now squeeze the magazine in until I feel a stop in magazine's motion, then pull on the magazine to see if it pulls out.

 

[checkmyswag]

I've never dropped a mag using the "auto-forward".

However, I did find the "click" when it didn't strip a round concerning.

Plan on continuing to use it but training for when it doesn't work as well.

I was able to chamber a round and get back into the competition quickly when it did fail.

Time will tell if I stick with it I suppose.

 

[Manco]

all m&p's do it from what ive read.

My M&P40 does NOT do this, although I suppose it might if I slapped the mag in really hard, which I do not.

its considered a feature.
i like it.

Whether it's considered a feature depends on the individual. Personally, I prefer consistent, predictable behavior, which isn't the case, either way, for every pistol in this regard. It's not a major issue, but in a perfect world I'd wish that it were not a possibility.

 

[Owen]

why would you slap the m again on a slide-lock reload? Seriously bad mojo can result, like having the mag overrun the mag catch.

 

[Fishbed77]

I slapped the bottom of a Kahr extended magazine once, only to have the flimsy plastic baseplate explode and rain 9mm cartridges everywhere.

I learned my lesson right then and there.

 

[Manco]

I find the "tap" or "slap" whatever technique to seat the magazine a deficient technique. You can tap and slap until your palm goes numb just to witness your magazine dropping to the ground after your first shot.

The reason is that no matter how hard the jab is, what locks the magazine in place is the magazine being inserted deep enough and staying there long enough for the magazine catch to engage it, and the tapping often does not ensure that the magazine is deep enough AND stays deep until the magazine catch engages securely. The pain in your palm is not a good indicator of that.

Absolutely right--the magazine can bounce as well as send other parts bouncing around inside when you apply momentary, forceful blows. Why run the risk of random failure when you could simply insert the magazine fully and hold it there for a split-second once you reach the end of travel?

In general the key to the most effective use of firearms, whether it's acquiring a sight picture, pulling the trigger, or inserting a fresh magazine is to use smooth movements--slowly at first to get it right, and then faster and faster as your skill grows through repetition, but always smooth and calculated.

I now squeeze the magazine in until I feel a stop in magazine's motion, then pull on the magazine to see if it pulls out.

That's how you're supposed to do it, although I'd only pull on the magazine if I had the luxury of time and for some reason didn't hear/feel a positive click.

 

[MedWheeler]

I slapped the bottom of a Kahr extended magazine once, only to have the flimsy plastic baseplate explode and rain 9mm cartridges everywhere.

That's a funny vision, but only because it didn't happen to me.
Incidentally, my Bersa is easy to make the slide snap forward with a mag insertion, too.