[uncle_walty]

After reading about the new 15 round Steyr M9A1 magazines from stevehf48's M9A1 review, I tried to find some on-line but didn't have any luck. So all you lucky 15 round mag owners, please help me out. First let me know where you got them. Second, if you have a digital camera, please take apart your magazine (probably needs a cleaning and some silicone lube anyway) and post some pictures of the follower, base plate, spring and mag body. I would like to see what the difference is to allow the extra round. Here's a picture of 14 round mag for comparison in case you can't post a picture. Thanks.

(Image link fixed by D247)

 

[madecov]

I've found several 14 round magazines available for the 9mm.

$25.00 ea

 

[Guest]

15 round mags

As soon as I get a chance to charge up the battery on my digital camera, will take some photos for you. The 15th round goes in easily and there is yet a little more room on top of that one. I called the Steyr-Mannlicher International Office at 662-492-8924 in West Point, MS a few days ago and asked them if the 15 round mags were avail to purchase as I wanted to have another one so I can fill up both spare cases on my shoulder holster and they stated that they were available through them for $26 each plus $7 Shipping & Handling. I sent a check in, will post the info when I recv the mags. I asked them if any other accessories were available and they stated that right now it is just the mags but that they are relocating to a new office soon.
I took my mag apart and compared it to your photo. Appears to me that my mag spring has one or two less coils in it than yours, that may account for the room for the 15th round. The body of the mag and follower and base look the same, at least as far as I can tell comparing my pieces to a photo, really impossible to be certain without either measuring or comparing side by side. But seems like the spring is different. Do you agree that one or two coils less might make a significant enough difference to account for the extra round?

 

[uncle_walty]

Thanks for fixing the photo link D247.

$26 for the 15 rounder is not too bad. But if I can make a quick mod to a $19 14 rounder from On-point or the ones I already have, so much the better. Sorry my photo wasn't better, I compressed it too much. I notice it is hard to see the details. I'd suspected that there is no change to the mag body since you indicated before that the 15s also have the groves along the sides. Since I can usually just barely squeeze a 15th round in the 14 rounders (depends on the mag and the ammo), eliminating a couple of coils should give it a little more room if the spring are fully compressed when loaded. Does you 15 round spring have more than ~4 coils of smaller outer dimension coils on top by the follower. The smaller coils fit into the follower but also may allow a shorter fully compressed spring stack since the smalle coils might fit into the larger coils. Might have to get a 15 rounder to compare when Steyr gets up and going with the spare parts I also need. Thanks for the info.

 

[uncle_walty]

FYI. The 10 round M9 mags have a shorter spring then the 14 rounders. The shorter spring has 4 small coils and 7 large coils while the 14 round spring has 4 small coils and 8 large coils. Also the legs on the follower are a little bit shorter than on the 14 round follower. Installing the 10 round spring into the 14 round mag allowed me to feed in 15 rounds and there is still 1/8" left to spare. Seems like there is still plenty of spring force. I'll have to test it out at the range to make sure it functions reliably. If it does, I can drill another hole on the odd side and I'll have a 15 round mag. The 10 round mags might actually be good for something if I don't want to modify the 14 round spring and follower.

 

[hiramabiff]

FYI. The 10 round M9 mags have a shorter spring then the 14 rounders. The shorter spring has 4 small coils and 7 large coils while the 14 round spring has 4 small coils and 8 large coils. Also the legs on the follower are a little bit shorter than on the 14 round follower. Installing the 10 round spring into the 14 round mag allowed me to feed in 15 rounds and there is still 1/8" left to spare. Seems like there is still plenty of spring force. I'll have to test it out at the range to make sure it functions reliably. If it does, I can drill another hole on the odd side and I'll have a 15 round mag. The 10 round mags might actually be good for something if I don't want to modify the 14 round spring and follower.

Keep us updated on how it turns out. I am anxious to hear about it!

 

[uncle_walty]

Ran 6 full mags of my own reloads thru the M9 using the "modified" 15 rounder today. No problems at all. Will update after few hundred more rounds but I think it is a keeper. Since I have many more full capacity mags then 10 rounders, I may have to shorten some springs and followers eventually.

 

[hiramabiff]

That was just great... thanks.


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