Return to .40 to .357 Sig M&P Shield Conversion Barrel
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5 of 5 High quality barrel June 21, 2026
Reviewer: Dave from PA  
The .40 to .357 Sig M&P Shield Conversion Barrel fit my firearm perfectly. The fit and finish was nicer than the stock barrel especially the polished feed ramp. The gun cycled normally with the .357 Sig ammo and was just as accurate as the stock .40 barrel.

Overall it was a great product. I certainly wouldn’t hesitate to purchase from them again.

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5 of 5 357 sig barrel for shield April 26, 2026
Reviewer: Michael Hathaway from Crosby, TX United States  
Item arrived very quickly… Quality looks great. Dropped right and seems to function well… First shot just on the edge of the X inside the 10 ring !!!!

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5 of 5 Excellent Experience February 8, 2026
Reviewer: Paul Pope from Suwanee, GA United States  
After looking a while for a 357 sig conversion barrel tr-enabling finally had them in stock again. The ordering process was easy, the barrel was received ahead of schedule and it dropped in without any issues. Well made product that is worth the cost. Recommended for anyone looking to convert a 40 Shield over to 357 sig.

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5 of 5 M&P40 Shield .357 Sig Conversion Barrel January 22, 2026
Reviewer: Henry K from Oklahoma City, OK United States  
The conversion barrel is a great product for the M&P40 Shield. I also have the compensated conversion barrel. The conversion barrel makes it possible to shoot the awesome .357 Sig cartridge in the M&P since S&W doesn’t make handguns in that caliber any longer. Shipping was fast and RemSport MFG is fantastic to do business with.

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5 of 5 Easy installation and seems to fit well. January 21, 2026
Reviewer: Bobbygun from Lowell, OR United States  
I just got the barrel in the mail today.  Super easy to swap out and fits well.  Looking forward to shooting it this weekend.  A friend had the same barrel in his Shield and I shot his pistol with zero hiccups.  I'm hoping to have the same experience!

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3 of 5 Purchase of Conversion Barrel July 17, 2024
Reviewer: LEPD Firearms from Columbus OH  
The process of purchasing the barrel was as expected and shipping was relatively fast.  Unfortunately I have had some follow up questions and after many emails, phones calls and social media outreach, have never been able to get in contact with anyone at the company.  The product appears to be good, but customer service for some reason is zero.

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5 of 5 S&W Shield 357 barrel June 29, 2024
Reviewer: Neal Kelly from Spotsylvania, VA United States  
fit is great no play, chambers smoothly,
waiting to test fire THANKS !!

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1 of 5 Jam-o-matic June 25, 2024
Reviewer: Donald H. from Johnstown, PA United States  
Did visual inspection and cleaning.  All looked good.  Loaded 3 mags (2 7-round, 1 6-round) with Winchester factory 357 Sig 125 gr ammo.   First mag had 2 FTFs.  Had to slap bottom of mag to get slide to close.  Second mag had to do that 4 times.  Third mag another person tried to shoot and same FTF.  He palmed the slide shut and “click”.  Slide froze closed on a loaded round.  Huge safety issue.  Rounds that did fire were all over the target.  Mostly to the left.  I shoot left-handed so when I flinch they go right!   Pure junk..don’t waste your money.

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5 of 5 .40 to .357 Sig M&P Shield Conversion Barrel May 13, 2024
Reviewer: Don Schultz from Beach park , IL United States  
As described AND 200 rounds flawless operation. POI 7 yards 1”

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5 of 5 Drop in .357 Sig barrel Shield .40 January 22, 2024
Reviewer: William Meier from Apopka, FL United States  
So far very satisfied. Fits like a glove. Can hardly wait to shoot it. Waiting for ammo to come in.

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