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Old March 14, 2008, 08:42 PM   #1
Khaot1c
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S&W M&P 40 -> Can I find a .357 SIG Barrel?

Greetings all,
as you can probably tell from my post count, I'm new to the Firing Line Forums, but this is a place I will be coming back to - A LOT. Pretty much I'm a noob when it comes to firearms, except the safety aspect. My "day job" is an aircraft armament systems tech in the US Air Force. Pretty much that is everything from putting the ammo and the bombs in/on the aircraft to ensureing the system works when the pilot hits the pickle button.

Anyway, I just picked up another pistol today - A Smith and Wesson M&P chambered in .40 S&W. From what i'm reading, all i need to do is drop in a .357 Sig barrel and this gun will work just fine with .357 Sig ammo. As most of you probably already know, the magazines are already marked: 40 / 357.

Can someone elaborate? As in;
Who would be an online e-tailer that would carry the barrel-
would a replacement barrel be able to shoot any standard (factory boxed) .357 sig ammo.
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Old March 16, 2008, 12:36 AM   #2
bakelite
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Barrels

Hey Khaot1c, Bar-sto and Jarvis come to mind. Good Luck!!!
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Old November 30, 2008, 03:09 PM   #3
Mountaneer13
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Results??? On the 357 Barrel

Khaot1c,

Did you ever have any luck finding a 357 SIG barrel for your M&P 40? If so please let me know cause I just picked one up and am also looking for a 357 barrel.

Thanks
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Old November 30, 2008, 03:54 PM   #4
kristop64089
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At one time Midway had them listed. I don't recall ever even seeing a .357sig M&P
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Old November 30, 2008, 04:42 PM   #5
LanceOregon
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Storm Lake makes outstanding pistol barrels, that are used by some really nice 1911 gun manufacturers. They have also made barrels for some of Sig's products for them.

They make a full line of quality stainless barrels for the full size S&W M&P product line, and will be adding products for the compact M&P's next year.

You can get standard barrels, as well as extended barrels that can either be plain, ported, or threaded.

They even sell a special .40 to 9mm Conversion barrel for the full size M&P If you put that in your gun, and replace your mag with a 9mm M&P mag, you will even be able to reliably shooting 9mm from your gun too.

So you could actually turn your M&P into a 3 caliber gun, if you wanted to.

I've got one of their barrels on my Glock 17, and it shoots great:




Here is a link to their website:

http://www.stormlakebarrel.com/barrels

.
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Old December 4, 2008, 09:44 PM   #6
jamesp2000
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I bought one at Midway a few months ago for my M&P 40 but I have not tried it yet. The .357 sig ammo is high priced!
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Old December 28, 2008, 04:07 AM   #7
Crawl
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This thread helps alot, but can I put a 4.25 long barrel in a compact? I have the M&P 40C and the shortest available 357 barrel is the 4.25
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Old December 28, 2008, 10:30 AM   #8
Kurt+P+
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I own a glock model 22 .40 smith & wesson. I purchased two conversion barrels for it, a 9mm from Bar-Sto and a .357 sig from Storm Lake. Both are completely reliable and function flawlessly in the gun. I can interchange them at will in just a few minutes. My .357 barrel is about 1/2 inch longer than glock stock so it extends out of the barrel by about a .5 inches. I think it looks kind of neat. LoL.
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Old January 2, 2009, 08:04 PM   #9
Crawl
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OK I've been asking around about the .40 to 9mm conversion and get most people telling me the ejector won't work reliably. Is there any wright ups on testing of this? Does anyone have any info?
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Old January 2, 2009, 08:24 PM   #10
oldkim
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cheap practice 357SIG Ammo

Jamesp2000,

You can get a great deal for 357SIG practice ammo at Georgia Arms.

http://georgia-arms.com/search.aspx?find=S357SIG

Frangible 357Sig for $200 for a case (1000 rounds). Comes to about $11 per box of 50 (that includes mailing fee).

Not bad stuff. Got my first case in and it shoots great. Just ordered another 2 cases. Can't pass up a great deal!

So, get your 357Sig's out and shoot away!
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Old January 3, 2009, 08:43 AM   #11
kirkcdl
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This is what I got for Christmas for my M&P 40:http://www.topglock.com/item/75895_S...el_Smith_.aspx

Works great so far...
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