[natedog]

I have read that you can use XD40 10rnd. magazines in the XD9 and load the 40 mags with 9mm and you get a mag that can hold more than 10 rounds that was made after the ban. Is this legal? Reliable? How many can you fit? Does it work with other pistol series (Glock, beretta, sig)

[Stephen A. Camp]

Hello. This might be the thread you seek?

Best.

http://www.hs2000talk.com/cgi-bin/ubb/ultimatebb.cgi?ubb=get_topic;f=1;t=002428#000002

[10-Ring]

I have done it and have also seen it done w/ other guns while at the range.
As I understand it, it is legal since no mods have been made to the mag and it can still be used as originally intended (in a 40 cal pistol ;) )

[SquirrelNuts]

My understanding (from reading a reply from the BATF) was that you could even modify the mag so long as it worked as originally built for the original gun. If you cut something, file something, remove something, that is fine so long as it still works (and holds the same number of rounds) in the original gun.

I forgot what the example was for this one, but a certain mag could have a notch added and it would fit another gun. Since the notch did not interfere when it was in the original gun, the mod was fine.

-SquirrelNuts

[SquirrelNuts]

I have been thinking about getting one of these guns. I am not sure if I want the 4" or the tactical (Skunkabilly must work for Springfield :) ). I have been looking all over for the .40 S&W mags to put in a 9mm. Who sells them online? Are they reasonable (~$20)?

-SquirrelNuts

[Stephen A. Camp]

Hello. I think some folks are selling them here...

http://www.hs2000talk.com/cgi-bin/ubb/ultimatebb.cgi

Best.

[natedog]

I like them too. I think the 4" inch looks cooler, but the 5" model has the advantages of longer barrel and sight radius. That green grip is really ugly though!:barf:

[charleym3]

Can it be done? Yes
Legal? Yes.
Reliable? No.
Other guns? Yes.

There are two failures that are common. The first is that the cartridge tends to ride up in the front. At times the round will come out at an abnormal attitude and the nose of the bullet will miss the chamber opening, or the side of the cartridge will lay flat against the feed ramp. Then everything is bound up. It is not frequent but both have happened to me when I was experimenting. This can be over come by reshaping the feed lips. This could get into a shade of grey as to legality. I don't want to go there.
The other problem is that the rounds ride higher in the magazine which made my beretta, glock, and XD lock the slide back when there was still a round in the magazine.

YMMV but it's not for me. In a pinch maybe, but not as a regular thing.

[railroader]

charleym3, I have to disagree on the reliability issue. I have an XD 40 mag I use all the time in my HS 2000(XD). It is just as reliable as my 9mm mags. I did pinch the feedlips in 20/1000's of an inch which is still wider than a stock 9mm XD mag. It feeds perfect and it locks the slide back properly. Also my buddy who has an XD 40 has used this mag and it functions perfectly in his gun. So I don't see the legal or the reliablity issue. I also have converted S&W 9mm promags that feed fine in both calibers so it seems there is some overlap in the width the feedlips need to be. So I seriously doubt the police will be out there with a caliper measuring feedlips. Mark

[The Mighty Beagle]

GREAT question. Just a thought though ...

I was pondering this very question a few weeks ago when choosing between a 9mm and a .40 Firestorm. I wanted to buy a 9mm so that I could use .40 mags, but then I asked myself why I felt I needed more than 10 rounds.

And the answer was, "because it's a 9mm and they aren't the best stoppers". Kind of circular logic, isn't it? So I came home with the same gun in .40 and feel more than comfortable carrying 10 rounds of that caliber.

No, I can't shoot cheap Winchester White box anymore, but it's accuracy was pretty haphazard anyway, so I don't feel short-changed.

[hksw]

"I did pinch the feedlips in 20/1000's of an inch..."


HAH. That's the information I've been looking for. Now I can mod my .40 mags for the XD9. Thanks for the info RXRer.

[Bobarino]

this also works in the USP-Compacts. .40 mags hold 12 9mm rounds and so far i have not heard of any reliablilty problems.

Bobby

[hksw]

Also works for the USP full sizes.

[akanotken]

I just tried this a week ago with the p99.

Fellow shooter let me stuff 9mm in his 40 mag. Held 13. I thought I might be onto something. But shooting was a disaster. FTF's all over the place. Of course, I wasn't about to bend the lips on his mag, and since the p99 hicaps are available I won't even by one to try (16 rounds sure rounds is better than 13, right?) Just wish they didn't cost so much, I'd own more.

Bottom line, not a good idea for the p99 :(

[Onslaught]

Fellow shooter let me stuff 9mm in his 40 mag. Held 13. I thought I might be onto something. But shooting was a disaster. FTF's all over the place.
I managed to stuff 15 rounds of 9mm into one of my P99 .40 mags.

I traded a 10 rnd 9mm mag for one of the "bad" (orange follower) .40 mags to 'speriment with. I'm going to bend the feed lips a bit and see what happens.

I have 2 pre-ban P99 mags that hold 16 each, and cost $70 each... 15 rounds for $20 is worth a little effort to me!

It's not a "bad" idea in a P99 at all, I've talked to 2 people on here who have done it successfully. But it does need to be a mag you can tweak.

[akanotken]

Hmmm, thx Onslaught. If you don't mind, could you pm me with your progress. You've got me interested. My first attempt was so bad, I couldn't imagine that it would be reliable enough for competition (and I'd never do it for SD unless I had no other means).

Also, have you thought about a $13 promag? might be worth a try? When you are done, will you test it to make sure that it holds .40's still?