So I picked up a CSX last week just a few days after buying a 3913 TSW. The 3913 is great, but a little too big to serve in place of my G43 when I need to be very discreet (i.e. pocket carry) at work so the plan is the CSX will replace the Glock for EDC.

On my first range trip with the CSX, I did discover one problem: the 10 round magazine will not seat when fully loaded and there is a round chambered, so you cannot top up and carry 10+1. There is no issue with the 12 round, or seating the 10 round when there is not a round in the chamber or with only 9 loaded and one in the chamber. The gunsmith at the range says he has seen this and expects S&W will make it a warranty issue.

There were no malfunctions of any kind while firing with either magazine firing about 140 rounds total, but I shot ten round groups and never tried to seat either magazine on a loaded chamber until I was off the firing line.

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NRA Instructor & RSO

I had this problem also, and when I took the guts out of the magazine, I found the spring was in backwards. Out of ten mags, two of them were like this.
Once corrected, I had no issues. I leave all my magazines loaded, and have found they became much easier to load after a week or so of sitting loaded.

My recollection is there were a number of problems with early CSX mags - SW was replacing under warranty but for a while none were available - possible mods? - replacements now available?

Magazines are now on the shelf for $38 in my area in most of the better gun shops. I found a couple of 12-round mags would not drop free when loaded, and they were replaced by S&W. I just had to wait on hold for a very long time with customer service. Since I dont make $76 an hour, it was worth it for me.

My 10rd and 12rd. mag wouldn't drop free when fully loaded. I sent in the 10rd. mag for warranty replacement, but the new one they sent back did the same thing. When I talked to them a second time they acted like the problem didn't exist. The mags swell when loaded (doesn't even have to be fully loaded), but the company doesn't see a problem.

That was a real problem for me. I heard a lot of “train to rip the mag” from a lot of people (who were at none of my gunfights).
I think maybe I just got lucky with mags. Leave yours loaded for a while and see what happens. I bet the problem goes away.

I left mine loaded 24/7 and it didn't make a difference. The mags just swell. I sold my CSX for as much as I paid for it so no loss, but there are kinks in the design that need to be ironed out.

My 12 round mag lost the plastic grip spacer. I have only had the gun to the range once and never noticed this piece missing when I put it away. Why wouldn't they make that piece fit snugly? Not very happy about spending that kind of money and having pieces fall off the first time I used it.

I wrote to them - let's see if they send me a replacement spacer.

I crazyglued them to the bases. I recognize that I will have to break it loose from there to get the magazine apart for cleaning, but crazyglue is cheap.

Just a quick follow-up: the 10 round magazine now seats, and both 10 and 12 round versions have always dropped out when full or otherwise. I will keep an eye on the topic to see if others report similar problems, but as there has been no failure to function while firing, at this point I am not too concerned.

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NRA Instructor & RSO

The fix for 10 and 12 round mags is to reverse the side of the follower the spring attaches to ... it should be the short side... evidently whoever S&W got to assemble the mags for CSX put them backwards (attached to the high side) ... mine work just perfectly now

So far no issues. Granted, only put 50+ through it but, I was able to put both the 12 and the 10 in with a round in the pipe.

It is a bit$% to get #12 and #10 in the mag though. I am assuming that after having them fully loaded, the spring will give a little.

I had a little trouble with the ten round mag, getting it fully loaded and inserted with a round in the chamber at first. And when I say "at first" I mean the first couple of times I tried it. Once it went in, the problem seemed to go away. No problem with either of them dropping free.

I picked up a couple of extra 12 round mags as soon as I saw them available. The ten round one now occupies space in the Bag O Mags in the safe.

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John 3:16 .

I’m surprised S&W CS didn’t recommend putting 100rds through the mags to loosen them up? Never the less, I’ve found the CSX to be an easy pistol to shoot one handed. Not bad

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"Non sibi, sed patriae"

My 12 round mag is a beauty. Loads easily, seats perfect and runs great. My 10 round mag is abysmal. It sounds like a box of nerds when loaded to 10 and won’t seat in the gun if the slide is forward. No matter how hard I try. Ive taken it apart and verified that it’s assembled properly. I’m throwin it straight into the trash when I get some more 12’s.


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