M&P 9mm 10 rnd mag spring modification

[thwkman]

Hi,

Anybody had problems loading 10th round in their 10 rnd mags and did anything about it?

I've tried clipping some coils and made it easier but not much.

So I clipped again now the follower does lock the slide.

Yes I know I clipped too much. But in only clipped less than one coil

Ideas? Besides live with it.

Thanks in advance

 

[Wishoot]

That really sucks. Sorry to hear of your troubles with the mag.

My Shield 8 rounder was impossible to fully load until I took the mag apart and flipped the spring. Don't know why, but that did the trick.

 

[dlbutler]

They get easier with use. I bought an M&P 45 yesterday and the mags were tough so I am leaving them loaded to break in the spring.

 

[rwsmith]

A Lula loader

A Lula loader would help with that. I load my mags until I can't load more and quit. The capacity is there if I actually need it.

 

[Kovariles]

I always presume that the manufacturer knows best and, usually, I am right. An UpLULA loader is a wonderful thing, it works, it is cheap, it is fairly universal and it makes modifying magazine springs unnecessary.

 

[Bkreutz]

Hi,

Anybody had problems loading 10th round in their 10 rnd mags and did anything about it?

I've tried clipping some coils and made it easier but not much.

So I clipped again now the follower does lock the slide.

Yes I know I clipped too much. But in only clipped less than one coil

Ideas? Besides live with it.

Thanks in advance

Are you talking about a 10 rd mag in a compact or a full size? Not sure I'll be of much help because I've never even seen a 10 round M&P mag, but maybe more info may help someone else who has.

 

[rdtompki]

It's very difficult to get the 10th round in. Using the loader is tricky on that last round since the loader's "tongue" takes up too much room in the stack. With 10 rounds loaded the mag needs a good smack when the slide is in battery to ensure that the mag is actually locked in place.

 

[Saudade]

http://smith-wessonforum.com/smith-wesson-m-p-pistols/380353-9-round-mags.html

 

[Rick_A]

Never assume the manufacturer and their engineers got it wrong. Appropriate springs should never be cut or modified.

They break-in and take a set with use. Cutting the spring only reduces the reliable life of the mag.

 

[macski222]

Don't mess with mag springs. In the case of 10 round mags (that we are so blessed to need in MA) you can take the mag spring in follower out of the mag, and sand down the posts on the follower a bit. I've had to do it with all my 10 rounders for my mp9c. Now I can get that last round in no problem.

Yes, with use over time it'll become easier to load the last one, but its really the bottom of the follower that makes it a problem.

 

[rsrocket1]

10 round mags are supposed to hold only 10 rounds and are invalid if there is any way you can possibly load an 11th round in there because 11 rounds suddenly makes it a dangerous "high capacity assault clip".

Go and buy a replacement spring and start over. This time use an Uplula loader. You can do it without the Uplula if you place the magazine on a table to load, push down the top cartridge with your left thumb to allow the next cartridge to go into the mag using your right hand.

It also helps to tap the magazine as you are loading it so that the cartridges line up properly within the mag. Yes that 10th round will still be tough to get in, but you'll have a better chance if there aren't any misaligned cartridges taking up extra space.

BTW, springs loosen up as they are worked back and forth so leaving a full mag to sit around does not make a difference. Good luck.