4" .40 to .357 Sig M&P Threaded Shield Conversion Barrel
4" .40 to .357 Sig M&P Threaded Shield Conversion Barrel
 
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Our Price: $149.99
NOTE: It is the customer's responsibility to verify the legality of threaded barrel ownership and installation in their location. RemSport Mfg is not responsible for violations of local laws by their customers.

Stock Status:In Stock

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Product Code: BA-P-MPS-4-40-357CT
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Description
 
Remsport 4" .40 S&W to .357 Threaded Sig Conversion Barrel for the M&P Shield.
  • Designed as a Drop-in Solution, This Barrel Converts Your .40 cal Shield to .357 Sig Without Requiring Fitting.
  • 100% Made in House from Select U.S. Sourced 416 Stainless Steel
  • Precision Broach Cut 1:16LH Twist Rifling
  • CNC Diamond Honed Bore
  • Improved Chamber and Feed Ramp Design for Increased Reliability
  • Barrels are Ferritic-Nitrocarburized (Melonite™) for an Ultra-Durable Black Finish that is Integral to the Unit's Performance and Function
  • Overall Barrel Length 4.5"
  • Lifetime Warranty on All RemSport Mfg Barrels
  • Compatible with 2.0 4" Shields, Will Not Fit 3.1" Shields


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


Due to compliance and restrictions concerns we cannot ship to some locations. Orders made in these cases will be cancelled and refunded if applicable.

Average Rating: Average Rating: 5 of 5 5 of 5 Total Reviews: 3 Write a review »

  0 of 0 people found the following review helpful:
 
5 of 5 Excellent fit July 19, 2025
Reviewer: Anonymous Person from Amelia, OH United States  
Beautiful barrel, clean machining. Standard 9mm threads

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  0 of 0 people found the following review helpful:
 
5 of 5 My sixth barrel and they are all outstanding! May 29, 2025
Reviewer: Anthony Salkauski from Hamilton, NJ United States  
I will note I was a little disappointed that the barrel didn’t come in the storagecontainer that they usually do and in a Ziploc bag instead. But that doesn’t take away from the barrel.

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  0 of 0 people found the following review helpful:
 
5 of 5 Excellent barrel March 11, 2022
Reviewer: Michael Williams from Tucson, AZ United States  
Love this barrel, mirror polished feed ramp and dropped right into my M&P40.

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