CZ-75B Magazine?

[Jesse308]

I'm planning on getting a CZ-75B in 9mm and I was wondering if the .40 mags for the CZ-75B fit the 9mm version for 15rd highcaps? Thanks

 

[Walt Sherrill]

You may have to tweak the feedlips, narrowing the gap a bit. Some work without adjustment, some don't. Depending on the mag (who makes it) and the follower, you'll get anywhere from 12 - 14 rounds.

Tweaking the feed lips shouldn't be considered "manufacturing" a high capacity device, as it is routinely done to keep mags working right. You can always tweak them the other way. You just shouldn't make any changes to the mag that keeps it from working in the original gun. (Adjusting the gap to hold a 9mm round won't keep it from working in the original gun.) May not feed quite as well as it should, but it will work.

I've done this both ways: using 9mm mags in .40s and vice versa. No big deal.

I also have a copy of the BATF letter that says this is legal.

 

[Jesse308]

Thanks Walt.

 

[orangeninja]

To be honest the ones from cheaper than dirt for a little over 15 bucks work great. I had 3, never a problem from any of them.

 

[bountyhunter]

I had problems with the CTD cheapies. The mags were wider than stock and the front edge dragged on the trigger bar and kept the trigger from resetting. I had to file the heck out of them to get them to work, now they work OK.

 

[R.H. Lee]

ummmm.......

I'm not a lawyer and presumably you're a big boy, but you may want to re-think doing something that could compromise your ablity to legally own firearms in PRK.

Why not just carry an extra 10 rounder?

 

[bountyhunter]

I'm planning on getting a CZ-75B in 9mm and I was wondering if the .40 mags for the CZ-75B fit the 9mm version for 15rd highcaps? Thanks

I didn't quite understand that either. If you mean can you use a .40 (10 round) mag as a 9mm mag..... it may or may not work, but you will only get in one extra round. It's legal to do it, but hardly worth the hassle. If you are in PRK, it is illegal to obtain any high cap mags now that you did not own prior to the ban here. Even if somebody else owned them here legally, they can not sell, lend, give, teleport, bequeath or do any thing else which will land them in your posession.

 

[clipse]

it may or may not work, but you will only get in one extra round.

I get 4 extra rounds(14 total) with .40 mags in my P-01 9mm. Just FYI.

I got a 19.99 mag from CTD and it didn't was total crap. I would not recomend them from my experience.


clipse

 

[bountyhunter]

I get 4 extra rounds(14 total) with .40 mags in my P-01 9mm.

Maybe, but the difference in diameter between the .40 and 9mm (which is .36) is almost exactly 10%. Not sure how you get 40% more capacity in yours, maybe the smaller rounds can sneak by the "blocking dimple" punched in the side to stop the .40 rounds from filling it and utilize the whole length of the mag shell. In general, 10 round .40 mags will hold 11 rounds of 9mm unless something strange is going on with the shell design.

 

[tiberius]

In a single stack magazine, the 10% "rule" would be accurate, but in a double stack design they can pack more closely and depending on the dimensions, the increase can be dramatic....as Clipse documents.

 

[Walt Sherrill]

And, in some mags, with different followers, the follower design allows a "skosh" more room, which accounts for 14 rounds rather than the typical factory 13 in a "compact" hi-cap.

(And as noted, double-stack makes a big difference.)

 

[railroader]

Jesse308, the promag 40's will hold 13 or 14 9mm rounds. For the record my xd 40 mags hold 15 rounds of 9mm. Mark

 

[PCRCCW]

tiberius beat me to it.....it only counts on a linear basis.....not a double stack.
My Compact mags hold 14 rnds.......and they are very happy too

Shoot well.

 

[bountyhunter]

And for the record: when I tried to put 9mm ammo in my Para .40 mags, the rounds fell out because the lips were too wide to hold them. The beretta 92/96 series mag shells are identical between 9 and .40, and with the rest it just depends. But if you do have to modify the feed lips, be advised: they make mag shells out of brittle steel and you only get a couple of bends before the steel cracks (ask me how I know).

 

[Walt Sherrill]

re: brittle steel.

I don't think they're all as brittle as the one(s) you had problems with. I've done a bit of tweaking, over the years, and have yet to break the first one.

And, as previously noted, some don't require adjustment. (But only some.)

Mag brakes, however, are different. (Ask me how I know. <grin>)