USP9 jet funnel mags

[JodyH]

Has anyone had any issues leaving the USP9 jet funnel 18 round magazines loaded for extended periods?
I've heard it both ways. That H&K does not recommend using them outside of competition, and that they work just like the regular magazines.
I have a USP9 w/TLR3 that is a dedicated nightstand pistol and would like the 3 extra rounds "just because" but not at the expense of reliability.
This pistol isn't carried and isn't exposed to the elements, just sits on the headboard then goes back in the safe.
I won't be using the funnel, just the extended mag.
I've put several hundred rounds through this mag so far with no issues, just wondering about the long term.

[Up1911Fan]

I don't know enough about HK's to give you a good answer, but if it were me, I would leave one loaded for a couple week's then go test it.

[JodyH]

From the old H&K-USA official forum:

"Due to heavy use and abuse that mags used by military & L.E endure, they are not recommended to ensure reliable function. The high capacity of rounds and increased pressures exerted within the mags when left loaded for extended periods of time can affect feed lip position, mag spring tensile strength, and integrity of the polymer mag housing. HK recommends that they be used for "sporting purposes".
The spring issue I can see, I'll buy a few Wolff +10% springs and call it good.
Feed lips should not be under tension in magazines that are inserted in the pistol. Stored yes, inserted no.
Integrity of the mag housing (probably bulging due to them not being fully metal lined), again I can see this being a problem if they aren't inserted in the pistol.

My analysis is that if I keep it in the pistol and use a good Wolff XP spring it'll be just fine.
Anyone disagree?
:confused:

[tremiles]

Anecdotal experience of one, but I never had issues with my USP40T jet funnel mags loaded and inserted when I used it as my nightstand gun. I tested it about once a month for function but otherwise it sat on my nightstand.

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[BigBoss0311]

Howdy, while not the 9mm JF mags, I have the .40 JF mags. I have a little over 30k rounds through 20 of these mags. I leave 6 loaded at all times. I have had zero issues with these mags. I use these fairly hard, dropping them loaded, partially loaded, and empty, stepping on them, and just general use. I have not had to replace any mag springs on mine yet as they still feed reliably and do not feel 'loose' when loading the mags. I have also met a few LE individuals who use the 9mm JF mags overseas and they have said they prefer them to the regular mags.

[Josh Runkle]

I would install the jet funnel if you're going to use the mags. Here's my reasoning: court case following defensive shooting, anti-gun people, facts being twisted, photos of that "death machine that doesn't use 'standard' mags", etc.

[tremiles]

I would install the jet funnel if you're going to use the mags. Here's my reasoning: court case following defensive shooting, anti-gun people, facts being twisted, photos of that "death machine that doesn't use 'standard' mags", etc.

Wha-huh? Not sure if this is a joke or not, but JF mags are standard capacity on some versions of the USP.

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[Josh Runkle]

Wha-huh? Not sure if this is a joke or not, but JF mags are standard capacity on some versions of the USP.

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Correct, but they are "standard" when used with a jet funnel.

Hence, why I recommend installing the jet funnel. I never said don't use the mags.

[tremiles]

Correct, but they are "standard" when used with a jet funnel.

Hence, why I recommend installing the jet funnel. I never said don't use the mags.

By that notion, jet funnels are standard only on a USP9SD or 40T. They make reloading faster and thus more deadly than a non-SD/T USP without a JF.

If a prosecutor wants to hang you out on an otherwise good shoot, they're going to hang you out.

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[GardoneVT]

I would install the jet funnel if you're going to use the mags. Here's my reasoning: court case following defensive shooting, anti-gun people, facts being twisted, photos of that "death machine that doesn't use 'standard' mags", etc.

It doesn't matter.I've read a case brief on a guy who was villified for using a factory stock Kimber 1911 ,carried Condition 3 .He didn't even shoot the attacker, but the defender was an old white Vietnam vet and the actual instigator was an ethnic dude in a population center.Said ethnic dude called the cops saying a crazy white guy threatened him with a hand cannon, and the rest was history until trial.

At which point the Prosecutions argument that the .45 ACP Kimber -and the two spare 8 round magazines along with it-was some kind of exotic death ray was refuted by expert testimony.

[Josh Runkle]

It doesn't matter.I've read a case brief on a guy who was villified for using a factory stock Kimber 1911 ,carried Condition 3 .He didn't even shoot the attacker, but the defender was an old white Vietnam vet and the actual instigator was an ethnic dude in a population center.Said ethnic dude called the cops saying a crazy white guy threatened him with a hand cannon, and the rest was history until trial.

At which point the Prosecutions argument that the .45 ACP Kimber -and the two spare 8 round magazines along with it-was some kind of exotic death ray was refuted by expert testimony.

I agree that if you're going to be hung, they'll try it with no matter what gear is used, but why have a mag that you can probably find HK writing 30 different places "only for use with jet funnel"?

Or have a good reasoning for doing it that way, like: "I took training from this person and they recommend using this HK with the jet mag without a jet funnel".

Anything you do for defense should be backed by training and recognize that it may/will be called out in court.

I'm not disagreeing with you guys or saying not to use a jet mag. I'm just saying "use as recommended". If you don't use as HK recommends, then have another name ready to be used as "this expert recommended I do this".

[JodyH]

I'm well versed in lethal force justification.

Back to the topic of the actual function of the magazines.
:cool:

[GardoneVT]

I agree that if you're going to be hung, they'll try it with no matter what gear is used, but why have a mag that you can probably find HK writing 30 different places "only for use with jet funnel"?

Or have a good reasoning for doing it that way, like: "I took training from this person and they recommend using this HK with the jet mag without a jet funnel".

Anything you do for defense should be backed by training and recognize that it may/will be called out in court.

I'm not disagreeing with you guys or saying not to use a jet mag. I'm just saying "use as recommended". If you don't use as HK recommends, then have another name ready to be used as "this expert recommended I do this".

Unfortunately, in this litigous age we live in, if you pull a flintlock you'll be hit with a bogus criminal case/civil suit for using an "Assault Antique".Just plan on it as a hazard of armed self defense.

Glock ,in point of fact, at one time recommended all non-LEO users carry with an empty chamber.I doubt that's a common practice , and for good articulable reason.There are some things which are legal quagmires, depending on where you live and the local political mores .Even then, that's a cultural issue more then it is legal.

In your case, if a jury pool of YOUR peers is likely to look down on a magazine as a sign of moral impropriety, you need to move to the United States of America.In my neck of the woods DAs don't prosecute people for shooting bad guys, but in Blue State America the bad guys ARE the constituents.It's your butt on the line, so it's up to you.

[JDM]

If you guys would like to discuss potential legal outcomes related to the use of force, please do so in another thread.

[JodyH]

While we're on extended magazines, anyone have experience with the 32 round H&K USP 9mm mags?

[BigBoss0311]

Expensive, but gtg. Works with .40 as well. If you are a tinkerer, there is a thread on hkpro where a guy takes a 50rd glock drum mag and makes it work with a USP mag.

[Guinnessman]

Jody,

I once owned a USP .40 with a Jet Funnel. I usually cycle/shoot my carry/HD ammo once every 6 months. After one year of owning the JF mags, I started to experience failures to lock the slide on empty magazines. Since the JF was added after I bought the USP, I decided to go back to the original factory mags and ditch the JF.

[Dr. No]

I have used the jet funnel mags extensively on duty for the last 3 years as well as for competition. In regular use I don't think you will see any problems. I have my set of three duty mags that I rotate ammo through annually, and I've never had a malfunction with them loaded 24/7.

I have managed to destroy several mags by using them outside their design perimeters: Putting basepads on them and loading them to 18 rounds put way too much pressure on the feed lips and they spread. It also wore out the mag springs quick.

The only other way I was able to beat them up is using them at a range that had a concrete floor. The lips the basepad slides onto are plastic, and the basepad is metal. If you drop them enough on the concrete the plastic will crack and rip the lips off.

[WOLFIE]

I have used the jet funnel mags extensively on duty for the last 3 years as well as for competition. In regular use I don't think you will see any problems. I have my set of three duty mags that I rotate ammo through annually, and I've never had a malfunction with them loaded 24/7.

I have managed to destroy several mags by using them outside their design perimeters: Putting basepads on them and loading them to 18 rounds put way too much pressure on the feed lips and they spread. It also wore out the mag springs quick.

The only other way I was able to beat them up is using them at a range that had a concrete floor. The lips the basepad slides onto are plastic, and the basepad is metal. If you drop them enough on the concrete the plastic will crack and rip the lips off.

Dr. No, Are you saying that the feed lips on the JF 9mm 18 round magazines spread due to being loaded to 18 rounds? I have 5 of these magazines and I put the HK plastic floorplate on them.

[Dr. No]

Dr. No, Are you saying that the feed lips on the JF 9mm 18 round magazines spread due to being loaded to 18 rounds? I have 5 of these magazines and I put the HK plastic floorplate on them.

No, sorry I was talking about the 40 mags. I put basepads on the 16 round mags and loaded them up to 18-19, and they gave up the ghost.

Keep the mags stock and you will have no problems.

[WOLFIE]

No, sorry I was talking about the 40 mags. I put basepads on the 16 round mags and loaded them up to 18-19, and they gave up the ghost.

Keep the mags stock and you will have no problems.

Thank you, Dr. No.

It looks like HK has jf mags with a new design on the market now. The mag body is solid black.

[Dr. No]

Thank you, Dr. No.

It looks like HK has jf mags with a new design on the market now. The mag body is solid black.

All the extended jet funnel mags are clear. The black mags are the standard size and will not work with the magwell attached to the pistol.

[BCL]

What about these?

http://www.hkparts.net/shop/pc/HK-USP-9mm-18-Round-Jet-Funnel-Magazine-Steel-p14549.htm

They aren't available yet but should solve the durability issues.

[Dr. No]

I don't think anyone has seen them yet, so I don't know how they will work. The description reads "Polymer Over Steel" so it sounds like they may be the same as the old ones. With any luck they will be full metal lined and possibly have metal lips at the bottom, that would be a big improvement.

[BigBoss0311]

They are out in the wild. There are a few reviews on hkpro. Word on the street is they seem more durable than the translucent mags. They have a larger baseplate and they stick out a little further.
Here you go:

http://www.hkpro.com/forum/hk-handgun-talk/177631-new-jet-funnel-18-rounds-mags-vs-old.html