Magazine not locking in - MP-Pistol Forum

Magazine not locking in

This is a discussion on Magazine not locking in within the MP Reference forums, part of the Smith & Wesson MP Forum category; Just bought my first hangun, an M&P 9 Shield. When trying to pop in my 7 round mag it does not stick in (maybe stays ...


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Old April 25th, 2014, 09:14 AM   #1
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Magazine not locking in

Just bought my first hangun, an M&P 9 Shield. When trying to pop in my 7 round mag it does not stick in (maybe stays in about 30% of the time). I push it up and hold my hand there and it will still pop back out. It does not do this with the 8 round mag so I feel like it is an issue with the magazine itself. Why do y'all think this is?
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Old April 25th, 2014, 10:09 AM   #2
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Did you clean the mag at all? It is possible that the follower in the mag is just getting stuck because of some of the stuff the factory uses to protect the metal. You may also try giving it a sharp "whack" on the end of the mag to see if it is just getting hung up on the mag release. Mine were tight when they were new. I pulled the mag apart, cleaned and lubricated the inside of the mag case, and carefully cleaned the follower. It freed things up pretty well.
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Old April 25th, 2014, 11:26 AM   #3
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Did you clean the mag at all? It is possible that the follower in the mag is just getting stuck because of some of the stuff the factory uses to protect the metal. You may also try giving it a sharp "whack" on the end of the mag to see if it is just getting hung up on the mag release. Mine were tight when they were new. I pulled the mag apart, cleaned and lubricated the inside of the mag case, and carefully cleaned the follower. It freed things up pretty well.
Okay. No I haven't broken down the magazine to clean it. Does that little plastic cap on the bottom just slide off? Are you talking about the mag getting stuck though? Cuz my problem is it not clicking into place.

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Old April 25th, 2014, 12:32 PM   #4
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Will it lock in and drop free while empty, or only loaded? If it drops free empty, or partially loaded, it's just because the mag spring is VERY new, and needs to break in a bit. The upward pressure against the bottom of the slide is keeping it from locking in. You'll have to really squeeze it or slam it home when it's new. Don't worry, they're designed to get SLAMMED home.

The 8-round mag uses the same spring, so it's compressed a bit less.
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Old April 25th, 2014, 05:45 PM   #5
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Will it lock in and drop free while empty, or only loaded? If it drops free empty, or partially loaded, it's just because the mag spring is VERY new, and needs to break in a bit. The upward pressure against the bottom of the slide is keeping it from locking in. You'll have to really squeeze it or slam it home when it's new. Don't worry, they're designed to get SLAMMED home.

The 8-round mag uses the same spring, so it's compressed a bit less.
Jeff
Yeah the 7 rounder feels a little stiffer. hopefully thats just it cuz I tried it unloaded and it was locking in. They both drop fine when I press the mag release. I mean I've been slamming it home pretty hard I thought maybe it was just bouncing off the top before it could snap in so thats why I would try to slam it and keep my hand up there to try and keep it from bouncing out but that never worked. Thanks. I just got home so I'm going to try to clean it like the first guy said and I guess I'll just keep on shooting and wait for it to break in.
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Old April 25th, 2014, 05:45 PM   #6
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How long does it usually take for a mag spring to break in?
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Old April 25th, 2014, 06:54 PM   #7
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How long does it usually take for a mag spring to break in?
Depends on how often you load and unload preferably by shooting!
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Old April 25th, 2014, 06:56 PM   #8
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Well so far Ive been shooting every day, ha. Don't know how long my bank account will hold up like this though. Sucks being a poor college kid.

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Old April 26th, 2014, 08:15 AM   #9
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As Jeff said, are you doing this on a closed slide? Try it with the slide open, it's common for a fully loaded mag to be hard to seat on a closed slide.
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Old April 26th, 2014, 03:26 PM   #10
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I have three Shields and they all were tight in the beginning. As Jeff Ward said, slam them home and they will lock up fine. All of mine have gotten easier to insert into the pistol with time and none now suffer any problems whatsoever.

Quote:
Originally Posted by TXRdnk View Post
Yeah the 7 rounder feels a little stiffer. hopefully thats just it cuz I tried it unloaded and it was locking in. They both drop fine when I press the mag release. I mean I've been slamming it home pretty hard I thought maybe it was just bouncing off the top before it could snap in so thats why I would try to slam it and keep my hand up there to try and keep it from bouncing out but that never worked. Thanks. I just got home so I'm going to try to clean it like the first guy said and I guess I'll just keep on shooting and wait for it to break in.
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Old April 27th, 2014, 04:21 AM   #11
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good information as I have had this on occasion but mine (357c) hasn't been shot very much...I will continue to monitor...

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Old April 27th, 2014, 05:33 AM   #12
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If you don't want to slam the magazine home, hard every time, first try it with the slide open. If that cures the problem, you have to very slightly shorten the follower legs, about a sixteenth inch. It is still does it, remove the end cap and on a hard, flat surface, very slightly sand a little amount off. This will allow the magazine to fit up in the gun a little farther. Don't take too much off, or it will be loose.

Last edited by agksimon; April 28th, 2014 at 02:09 AM.
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Old April 27th, 2014, 05:37 AM   #13
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Slap it in like you are slapping your women on the butt. You know with feeling. You wont hurt the gun by slamming it in with a little feeling.
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Old April 27th, 2014, 06:10 AM   #14
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You could pull the follower, take a couple mm off the anti-tilt legs. Of course, don't take too much or the follower will tilt and jam. Breaking it in is the better, but more time consuming, option. Leaving your magazines fully loaded will also help.
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Old April 27th, 2014, 04:34 PM   #15
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Quote:
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You could pull the follower, take a couple mm off the anti-tilt legs. Of course, don't take too much or the follower will tilt and jam. Breaking it in is the better, but more time consuming, option. Leaving your magazines fully loaded will also help.
Thanks. Yeah, I probably won't do any sanding and just wait for the spring to loosen up. When I'm not shooting I leave my mags loaded with my defense rounds.

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