Slide Release Issue w/ M&P40

[mrvash]

Before I call Smith and Wesson and address an issue to them regarding my brand new full size M&P40, thought I'd get some insight and/or advice from you fine people of Calguns.

I just purchased a brand new M&P40 it does have a mag disconnect safety. First of all, it shoots fine and so far seems reliable (only put 100 rds through it)
the only issue I have with it is when I fire the last round in the magazine, the slide locks back and when I 'quickly' insert a fresh magazine fully loaded with 10 rounds the slide goes into battery on it's own, I guess this would be useful if I were in a hurry and taking fire but I don't think this is normal nor is this suposed to happen.

It doesn't do it when I slowly put in the magazine or when the magazine isn't fully loaded. I've considered contacting Smith and Wesson, but I really don't want to wait months to get my gun back.

Also, what type of aiming system does this pistol uses? 6 o'clock? or do you cover the target with the front sight dot with a proper sight picture?

Thanks!

[Voo]

Do a search on this.. you'll find that it happens quite a bit with glocks and other firearms- your M&P included.. It's not a design feature, just a physics issue with inserting a magazine with "so much" force..

as far as the aiming system goes, I can't remember.. It's a modern service gun that's produced en masse, its' not meant to be a tack driver nor are the tolerances from gun to gun always going to be the same... however, 3-4 well aimed shots should sort it out..

If it were me, I'd count it as a plus and leave it that way..

[Mr. Wannabe High Profile Banger]

I think all guns should go into battery if you slam a mag in, better than flicking the slide catch or doing a racking motion. Just my opinion tho

[fastpowerstroker]

Yeah my m&p does this too. Also my Sig if I slam it hard enough. I wouldn't worry about it but its your call.

[CA Marine]

I have seen other posts regarding this being a feature the gun has. I actually like this as well! Kind of reminds me doing rapid fire with my M16 tapping the weapon hard to make the bolt go home! Awesome!!!

[sanjosebmx]

Deja vu

[Shenaniguns]

It was discussed about a week ago, long story short is that if you quickly insert a mag at the right angle of many handguns it will happen. Some are easier than others but include the M&P, 92FS, Glocks, some H&K's etc...

[mrvash]

Thanks for all the input guys, I'm beginning to look at this as a positive, if I can just find the right handle and "agressiveness" required make it happened everytime would be good, hot reloads

[Blackhawk556]

Keep it that way, I'm going to have to use more force on mine to see if this occurs as well.

[evolixsurf]

This is part of the design of a "military and police" type weapon. It eliminates a step in the reload process. Slam it every time and itll happen every time. There is an angle way to do it too, but i havent had to worry about the angle. It is a bummer though when you get used to it and then all the sudden it doesnt happen. Train both ways.