CM9 Magazines Sticking

[TimtheRef]

I have been noticing for awhile that any magazine I try in my CM9, (flush, extended with pinky grip, or P9 length) the magazines don't drop freely when I hit the mag release. The mags will come unlatched, and drop slightly, but then have to pulled from the magwell. I was hoping this would go away with time, but it hasn't yet. Gun has been through over 400 rounds. And I know I'm not blocking the mag release on the backside, as I'm a lefty, and I hit it by dropping my middle finger back, leaving no obstructing fingers on the opposite side of the pistol. Other than this, my CM9 runs flawlessly, and hasn't had a malfunction yet. Any advice?

[RonW]

My mags on my CM9 do the same thing. I wouldn't really stress too much over it...

[TimtheRef]

The only really annoying part is that it would be hard to use in trainings or competitions requiring tactical reloads.

[OvalNut]

Over time my PM9 mags started dropping freer. I took it as the magwell getting smoothed out.


Tim

[Buzzard45]

Take one of the sticking mags (stainless preferred), "paint" both sides with a magic marker, insert and remove a few times till you see the marker being rubbed off by the ribs in the mag well, then take some 320 grit sandpaper stuck onto a file, piece of metal, or wood, and sand the corresponding rib, just a couple of strokes at a time (you`ll want clearance but not too much to make it sloppy), then just wash the mag with some hoppy`s to remove the marker.
This worked for my pm45 and a friends cm9.
hope this helps ya.

[dustnchips]

I have a cw380 and noticed that you have to hold the mag release in until the mag drops free. This may be the problem. The catch is half way down the mag so the release has to be held until the mag clears it.

[Bawanna]

Buzzard has a good cure there. It sometimes helps to polish the mags and / or even wax them.

As he mentioned don't go crazy with the sandpaper and make it a loose sloppy fit, although that really don't hurt nothing once it's locked in. Just nobody likes a loose sloppy fit ya know?

[diablo53]

Take some emory cloth or a strip of 440 grit sandpaper put it in the mag well then the mag. Pull both out at the same time. Only do one side at a time and check to see if the mag drops free in between sanding. Might only take 1 or 2 tries per side to get the mag to drop free. Use the tightest mag you have to make sure all mags drop free.

[dustnchips]

I just bought a used PM9 and the 6 rd mag stuck a little. the 7 rd was fine. I did a couple of swipes with 1000 grit on a stick and the problem was still there. I measured the thickness of the two mags with a dial caliper and found the 6 rd was about twelve thousandths thicker up at the top than the 7 rd. I did a bit of careful compression with channel locks and got the difference down to about four thousandths and they drop freely. The difference in width was only in the first 3/8 inch. I have not had the gun to the range so I have no idea if there are any feed problems. Since no mag worked for TimtheRef I don't think this is his problem and think he got good advice above. Just some thoughts for other people that have some mags that work and some that don't.

[skiflydive]

My CM9 had one that stuck just like you describe. I VERY lightly squeezed the sides of my 1 sticking mag at the top of the mag in a small woodworking clamp. (there's another thread about doing this.) It had been .006 wider than the one that dropped free just fine. Then I used Johnson's paste wax on the mags and inside the mag well. It dries and doesn't leave any oily film. Then I held the mag release in and rapidly ran that mag in and out of the mag well a few hundred times. (don't let your wife see you doing this...it looks like you're doing something else...) Both mags drop free smooth as silk now. I'm NOT a proponent of sanding the mag well although others have had success with it. Had my solution not worked I might have gone that way though. My Dad taught me to start with the smallest hammer you'll likely need and work up to the sledge.

[dustnchips]

I started with a vise but wanted to put pressure on specific spots and the channel locks worked great. I don't care much for the idea of sanding because once its gone its gone for good. In TimtheRef's case none would fit and it seemed justified.

[diablo53]

I was only suggesting dragging some emory cloth through the mag well a time or 2. I would much rather not bend my magazine. That could adversely affect the follower's path of travel.

[bugs]

I had the same problem; tried all the suggested fixes with some success;took the slide off to see what happens during releases and found that if you release the release button a sea-hair too soon the shoulder on the mag catch acts like a clamp and grips the mag enough to hang up. release spring mighty strong!

my fix is having my local GS add .060 to height of button and reduce the catch by .010.

NRA LIFER
IDPA BELEIVER

[SaltyNC]

my fix is having my local GS add .060 to height of button and reduce the catch by .010.


Have you gotten it back, yet? Did that work for you? I had one free dropping mag and one sticking mag. Measured them with some calipers and found the sticking mag to be slightly wider at the top. Squeezed the lips on the sticking one with channel locks ever so slightly, and the sticking magazine dropped like a rock from that time forward.

Salty

[Bawanna]

Mine fortunately have all dropped without issue but I have helped a few others here using the squeeze method mentioned.
It usually doesn't take much to get them dropping.

I also polish and wax my magazines. They come with kind of a coating that isn't slick and almost sticky.
A good cleaning of the magazines right away helps a bunch.

[bugs]

yes, this worked! have had no issues with any reluctant mags; no issues with added height to release button while in pocket,IWB,OWB, two hand, strong hand, weak hand shooting.

NRA LIFER

IDPA BELEIVER