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Discussion Starter #1
Just got my M&P 9mm tonight and brought it home and immediately took it apart to check it out. I have followed the directions exactly, but the slide won't go back onto the receiver. It gets close to the end, but just won't go completely on. Saw another post on this and the writer said that the internal lock was turned on, but there isn't an internal lock on this one. There appears to be a spot where there could be one, but it is covered by a little plastic cap. Does the cap have to come off to turn off the internal lock? I don't think it was on because I was able to pull the trigger before disassembly. Do I have to take the gun back?



Thanks!

Punisher
 

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push on the firing pin plunger a few times it is likely stiff yet. you may also need to retract the striker a bit to free it up.
 

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Make sure the takedown lever is not rotating while you are pushing the slide back. I usually have to hold the takedown lever down while putting the slide on.
 

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Discussion Starter #5
Still can't get receiver to slide on

Tried all the suggestions...



The plunger appears to be moving without any trouble and moving the firing pin doesn't help to get the receiver to slide on any further. I messed with that for about an hour last night.



The takedown lever doesn't even wiggle when I'm sliding on the receiver. I can't move it at all actually when I'm trying to get the receiver to slide on so there is no way it's blocking the receiver.



It isn't just stiff or tough, it's like something is totally stopping the receiver from sliding that last inch. I'll have to call the vendor and see if I can return it. I've never had this kind of trouble from any of my other guns (multiple Glocks, Spingfield XD, etc.).
 

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Re: Still can't get receiver to slide on

punisher said:
Tried all the suggestions...



The plunger appears to be moving without any trouble and moving the firing pin doesn't help to get the receiver to slide on any further. I messed with that for about an hour last night.



The takedown lever doesn't even wiggle when I'm sliding on the receiver. I can't move it at all actually when I'm trying to get the receiver to slide on so there is no way it's blocking the receiver.



It isn't just stiff or tough, it's like something is totally stopping the receiver from sliding that last inch. I'll have to call the vendor and see if I can return it. I've never had this kind of trouble from any of my other guns (multiple Glocks, Spingfield XD, etc.).


Probably already checked but the takedown lever needs to be rotated to the down position for reassemble. Also make sure the recoil spring/guide rod is not reversed.

Also, just fyi, if you have a plug in the opening for the internal lock, you do not have the internal lock. No need to mess with that.
 

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Discussion Starter #9
I went back to the gun shop with the gun. The gunsmith says it is common on the M&Ps that one piece is manufactured to large ever so slightly. He filed a piece by hand for no more than 20 seconds gently and it works like a charm.



He said he had to do the same thing to his M&P when he bought it. Just in case anyone else runs into this problem.



Just to clarify - the sear deactivation level does not need to be down in order to tear down the receiver - but this means you need to pull the trigger (like a glock).



Thanks for the help everyone.
 

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:?: I would also like to know what he filed down.



Ron
 

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Culprit

Culprit was likely the ejector, as mine has/had a wear point on top left edge at the front after many takedowns and reassembles. There is a bit of slop (slide wiggle) just before and as the slide gets to the ejector.
 

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Discussion Starter #15
This is Punisher's wife posting - he can't post from work.



After searching the web for a good diagram of the internals I found a site that calls what was filed down the "trigger bar". Actually it was the little round part that sticks up that was filed down. The shop guy lightly filed the top of it down a bit and the receiver slides on and off like a dream now.



Hope this helps others with their M&P tech problems too!
 

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punisher said:
This is Punisher's wife posting - he can't post from work.


Welllll Hellllooo "Punisher's Wife" :wink: .... What are you wearing right now? JUST KIDDING!!!!





Thanks for the update. I am sure this will help the members of this forum!



Hub
 

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Discussion Starter #17
Hubmonkey1 said:
[quote name='punisher']This is Punisher's wife posting - he can't post from work.


Welllll Hellllooo "Punisher's Wife" :wink: .... What are you wearing right now? JUST KIDDING!!!!





Thanks for the update. I am sure this will help the members of this forum!



Hub[/quote]



This is the real Punisher. After reading your comment, I loaded my new M&P and am looking you up on google earth.



Just f-ing with ya. Funny post!
 

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Hmm. I hope he didn't file it too much - the firing pin block needs to move enough to release! I wonder if there's a goober in the FPB hole that's preventing the FPB from retracting completely?
 
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