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Smith & Wesson Barrel S&W M&P 357 Sig 4-1/4"

Product #: 339103 Smith & Wesson #: 399570000

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$77.99

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Product Information

This Smith & Wesson factory part may require Disassembly and Assembly to replace it. Some parts may require installation and fitting by a qualified gunsmith. Factory replacement parts are manufactured to the exact same specifications and tolerances and use the same manufacturing materials as the original parts.

Technical Information

Features: Smith & Wesson factory part

Gunsmithing Required: Disassembly and Assembly required to replace part

Notes:

Some parts may require installation and fitting by a qualified gunsmith

Factory replacement parts are manufactured to the exact same specifications and tolerances and use the same manufacturing materials as the original parts

Parts lists for Smith & Wesson handguns may be downloaded from their website Smith & Wesson, go to Customer Support, then Parts Lists

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Customer Reviews

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REVIEW SUMMARY

by PowerReviews

Smith & Wesson Barrel S&W M&P 357 Sig 4-1/4"

5.0

(based on 9 reviews)

Reviewed by 9 customers

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Displaying reviews 1-9

11/9/2012

(5 of 5 customers found this review helpful)

5.0

Best Purchase Ever

By nameapete

from under the Mississippi moon

Comments about Smith & Wesson Barrel S&W M&P 357 Sig 4-1/4":

A month ago I purchased the 9mm conversion barrel from Midway for my M&P 40 and now I just purchased the .357 Sig Barrel. I am so glad I bought a S&W M&P because now with the conversion barrels I have 3 guns in one..a 9,40 and 357...how cool is that? The only other thing is that I had to purchase 2 9mm magazines for the 9mm barrel but you can use the .40 cal magazines with the .357 ammo. Yes I am one happy camper and thanks Midway for the fast shipping and service!!!

11/3/2012

5.0

Smith & Wesson .40 cal. 4-1/4 in. Barrel

By Sandy V.

from North East Tenn....

Comments about Smith & Wesson Barrel S&W M&P 357 Sig 4-1/4":

This is a grate product from Midway and price is also awsome.. I bought my s&w .357 sig a few months ago, and now have the option of using the cheaper .40 cal. s&w rounds, what a grate deal 2 guns in one .....Drop in and off too the range, feeds well and shoots even better, no mag changes or spring changes, both .357 sig and .40 cal. work fine have over 400 rounds of .357 sig thru it now and 300 or so of the ,40 cal not one miss fire or jam with eaither round..Love this pistol.... Highley recommend this weapon...

4/29/2012

(2 of 2 customers found this review helpful)

5.0

100% drop in barrel no ...

By Scott

from South Hadley, MA

Comments about Smith & Wesson Barrel S&W M&P 357 Sig 4-1/4":

100% drop in barrel no gunsmithing needed its a must have for anyone with a full size M&P 40

4/20/2012

(2 of 2 customers found this review helpful)

5.0

I came home about a week ...

By Robert

from Hendersonville, TN

Comments about Smith & Wesson Barrel S&W M&P 357 Sig 4-1/4":

I came home about a week ago and there was a plastic bag on my doorstep with an envelope inside it so to get in the door I picked it up and took it to my bedroom and opened it up and it was a factory 357 4.25" barrel and I had just paid off my new full size 40 so I went straight to the range and shot 150 rounds through it, not a single problem at all. This very afternoon I went and shot another 100 rounds through this barrel and again it is flawless. I am a very happy camper to have two full size 40 and 357 as well as two compact 40 and 357 pistols that can be trusted!

12/18/2011

(11 of 11 customers found this review helpful)

5.0

As mentioned, absolutely ...

By Brett

from Sedro Woolley, WA

Comments about Smith & Wesson Barrel S&W M&P 357 Sig 4-1/4":

As mentioned, absolutely a drop in fit. I've had nothing but 100% reliability with my converted M&P40. You've got to love the ability to go from 88gr up to 147gr...and velocities exceeding 1700fps. Given the 357sig's one-shot stop percentage...it's a great replacement, with triple the capacity, for that old 4" 357magnum that will be collecting dust in the safe.

9/17/2011

(7 of 7 customers found this review helpful)

5.0

The barrel dropped right ...

By ROBERT

from LANCASTER, PA

Comments about Smith & Wesson Barrel S&W M&P 357 Sig 4-1/4":

The barrel dropped right into my S&W M&P .40 like it was made for it. No play and lock-up was tight. The pistol performed perfectly at the range. 150 rounds with no malfunctions. $78 for the added flexibility of having .40 & .357 in the same gun. I couldn't ask for more than that.

9/10/2010

(4 of 4 customers found this review helpful)

5.0

Works perfectly. No ...

By James

from CLEVELAND, TN

Comments about Smith & Wesson Barrel S&W M&P 357 Sig 4-1/4":

Works perfectly. No modifications required. Truly a drop-in barrel. Makes the M&P capable of firing the .357 Sig round by simply replacing the barrel. Two guns in one for eight sawbucks. S&W sure got this one right!

7/8/2010

(7 of 7 customers found this review helpful)

5.0

I purchased the M&P 40 ...

By Victor

from Frederick, MD

Comments about Smith & Wesson Barrel S&W M&P 357 Sig 4-1/4":

I purchased the M&P 40 because of the capability to switch to 357 Sig with just a barrel change that is half the price of everyone else. It fits perfectly and performs flawlessly! This gives me more flexibility for my CCW firearms. 9mm,.40 S&W, .45 ACP, and now .357 Sig! Instead of spending more for a German pistol and it's conversion barrel, spend it on this and save your money!

2/25/2010

(27 of 30 customers found this review helpful)

5.0

Truly a drop in barrel. ...

By Rob

from Denver, CO

Comments about Smith & Wesson Barrel S&W M&P 357 Sig 4-1/4":

Truly a drop in barrel. Gives you two guns in one. Highly recommend the 357 sig cartridge.

Displaying reviews 1-9

The statements and opinions expressed within Customer Reviews reflect each author's personal perspective and do not imply endorsement by MidwayUSA, its Employees or any other organization. Customers should in no way infer that MidwayUSA has validated review information as safe, accurate or appropriate.

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Smith & Wesson Barrel S&W M&P 357 Sig 4-1/4"

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