.40 to .357 Sig M&P Shield Conversion Barrel
.40 to .357 Sig M&P Shield Conversion Barrel
 
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Our Price: $139.99

Stock Status:In Stock

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Product Code: BA-P-MPS-40-357C
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A NOTE TO CALIFORNIA RESIDENTS:
We are aware you may have been notified of this item being back in stock. Unfortunately, due to recent legislation, we are not shipping this item with orders that bill to/ship to California, nor orders suspected to be destined for California. We apologize sincerely for this inconvenience.

RemSport .40 to .357 Sig conversion barrel for the M&P Shield.

  • Designed to be a drop-in solution, converts your .40 S&W Shield to 357 Sig with little to no fitting.
  • Compatible with both 1.0 and 2.0 Shields.
  • Precision broach cut 1:16LH twist rifling.
  • Improved chamber and feed ramp design for increased reliability.
  • CNC diamond honed bore.
  • An ultra-reliable Ferric Nitrocarburized (Melonite™) black finish that is integral to its performance and function.
  • Overall barrel length 3.1"
  • Made from 416 Stainless Steel.
  • Designed to be cross-compatible with models featuring a loaded chamber indicator.
  • Lifetime warranty on all RemSport MFG. barrels.

***All parts must be installed by a competent gunsmith. Some fitting and/or tuning may be required. RemSport MFG. has no responsibility or liability for the final fit and function of the firearm***

Average Rating: Average Rating: 4.5 of 5 4.5 of 5 Total Reviews: 99 Write a review »

  0 of 0 people found the following review helpful:
 
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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  0 of 0 people found the following review helpful:
 
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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  0 of 0 people found the following review helpful:
 
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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  0 of 0 people found the following review helpful:
 
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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  0 of 0 people found the following review helpful:
 
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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