HK USPc 40 to 9mm conversion- what's req'd?

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Originally Posted by GyroF-16

It seems that the slides have different dimensions between 9 and 40, making a drop-in conversion fairly impractical.

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Those differences will be internal, as the exterior dimensions are identical.

I'll try to remember to measure both when I get home, but I can tell you the breech faces are definitely different.

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Originally Posted by GyroF-16

Well, after doing some research, it's hard to find many people who are happy with EFK barrels, especially the conversion ones. It seems that the slides have different dimensions between 9 and 40, making a drop-in conversion fairly impractical.
I appreciate the input of all - my expectations were colored by lots of previous Beretta experience, where it was not nearly as complicated.
I guess I'll revert to the plan to watch HKPro, Gunbroker etc, and, if I don't find a good deal, eventually order one NIB from HK.

Thanks again to all...

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Did you find negative reviews of the EFK conversion barrels ? Or just very little info at all?

I've used Barsto and Lone Wolf 40 to 9mm conversion barrels in my SIG 229 and Glock 23 with good results but I have no experience with EFK products. The folks on SIG forum seem happy with their SIG barrels.

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Originally Posted by HCM

Did you find negative reviews of the EFK conversion barrels ? Or just very little info at all?

I've used Barsto and Lone Wolf 40 to 9mm conversion barrels in my SIG 229 and Glock 23 with good results but I have no experience with EFK products. The folks on SIG forum seem happy with their SIG barrels.

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Very little info since 2012. Lots of unhappy users prior to that. Mostly complaining of marginal reliability and poor/slow/nonexistent customer service. Some SIG users doing equivilant (9mm-9mm, 40-40, etc) barrel swaps reported no problems. But not many caliber conversion users were impressed.
Just enough to make me wary. And more inclined to either find a complete top-end or entire pistol to get to my 9mm LEM goal.

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Originally Posted by LSP972

Those differences will be internal, as the exterior dimensions are identical.

I'll try to remember to measure both when I get home, but I can tell you the breech faces are definitely different.

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Yes, certainly just internal dimensions. Apparently external barrel diameter, breach face, and maybe other dimensions around the ejection port area. I can still conceive that a valid and functional conversion barrel could be made to function in a 40 slide, but I'm not confident that EFK is that solution.
I'm just accepting that HK has a different design philosophy than Beretta. And that's okay... I prefer BMWs to Italian cars from a reliability standpoint, too. Not that I have any complaint about Berettas, but I think you get my drift.

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Originally Posted by GyroF-16

Not that I have any complaint about Berettas, but I think you get my drift.

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Oh, I most certainly do.

Sorry, didn't get a chance last night, and I won't be back home until sometime Friday. But if you are still interested, I will take those measurements. An important measurement is the width of the barrel lug; if the .40 is different from the 9mm, then no way do you want to "change uppers".

And truth be told, IMO you're likely to find a decent deal on a LEM USPc 9mm before you'll find a "complete upper" of same.

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Good luck in your search! I would watch HKpro closely and you will find a deal. Most of the guys over there are collectors, so you will end up with a total safe queen.

Since you are looking for a USPc, I would jump on a V1 (any variant) if the price is right and do a conversion. You may want to poke around some of the other forums like Sigforum or M4Carbine.net.

Well… anybody got some salt handy? To go with this crow?

I measured the barrels on both a USPc 9mm and USPc .40; from all angles. Except for the size of the hole through the middle, they are IDENTICAL. I suspect the Euro Pellet upper would work just fine on the .40 frame… but like I said earlier, I don't want to know bad enough to try it on MY pistols.

There ya go, Gyro… ball in your court.;)

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