Looking for a 40SW to 9mm conversion barrel

[RenoHuskerDu]

I'm trying to help a brother stuck behind enemy lines in Cali, retired LEO.

He wants a 9mm 4.25" conversion barrel for an M&P 1.0 40SW. Storm Lake quit making it. So now he's looking for NOS. The link below is a 5" on gun .deals search. Somebody else may have made this conversion barrel ... not sure who. Any info welcome, thanks.

Search results for "storm lake 9mm conversion" | gun.deals

 

[dwcopple]

A stock 9mm barrel works fine in a .40 slide.

 

[RenoHuskerDu]

A stock 9mm barrel works fine in a .40 slide.

But the 40 slide is slightly fatter.

 

[OKFC05]

KKM makes the conversion barrel
Full 40S&W to 9MM – KKM

 

[AppStFan]

I have been trying to find one as well. It appears that Storm Lake has discontinued the 40-9 conversion barrel and KKM shows to be out of stock.

 

[Rob613]

Factory 9mm barrel will work fine...a quick search here will show many have done it.


Smith & Wesson M&P 9mm Barrel, Full Size: MGW

 

[1sailor]

I swapped out the .40S&W barrel with a stock S&W 9mm barrel. After thousands of rounds I found a failure to eject rate of about 1 in 200 or so. If you use the stock .40 cal magazine it may lock the slide back with one round still in the mag. No problems when changed to a 9mm magazine.

 

[RenoHuskerDu]

KKM makes the conversion barrel
Full 40S&W to 9MM – KKM

Thanks for that tip. The gentleman at KKM explained that they're going into production with that in a couple weeks or so.

And as for Storm Lake, he said they were bought by Remington and only make in-house barrels now.

And yes, you can drop a 9mm barrel in a 40SW and it will cycle and fire, but it will be loose. It works if the zombies are coming up the driveway, as it were...

 

[1sailor]

There are many, many members who converted theirs to 9mm by swapping to the factory 9mm barrel. I don't know of anyone who complained of it "being loose". Mine certainly wasn't. The accuracy was on a par with a stock M&P9. However buying "custom made" stuff is cool I guess. Not necessary but you get to tell everyone it's custom. I am editing this to add a caveat. I'm not trying to guarantee that you will have zero problems and bet your life on it. But, at 99% reliable doing a conversion is perfect for target shooting and plinking.

 

[FortyFiveACP]

Earlier this year, I bought a Storm Lake 40-9mm 4.25" conversion barrel to use with my M2.0 compact. I found it NOS on Gunbroker. It has been flawless thus far. I looked around on e-Bay and GB before finally finding the one I bought. I seem to remember that some were a bit pricey but the one I bought was $115 which I thought was fine.

 

[mblake101]

I just purchased a OEM S&W 9mm barrel for my .40 cal for $79.99 from Midway USA.....they also have the best prices for 9mm magazines......

 

[Ruger Nut]

I'm trying to help a brother stuck behind enemy lines in Cali, retired LEO.

He wants a 9mm 4.25" conversion barrel for an M&P 1.0 40SW. Storm Lake quit making it. So now he's looking for NOS. The link below is a 5" on gun .deals search. Somebody else may have made this conversion barrel ... not sure who. Any info welcome, thanks.

Search results for "storm lake 9mm conversion" | gun.deals

Factory Smith & Wesson M&P 4.25 4-1/4 Full Size FS Pistol Barrel, .40 S&W 40 SW | eBay
Stormlake Barrel for S&W M&P 9mm Luger Stainless 4.25" 34126 848589010153 | eBay
Storm Lake Barrel S&W M&P 9mm Luger 1 in 16" Twist 4.25" Stainless Steel 848589010153 | eBay