(3 reviews) Write a Review

Stern .40S&W barrels are ideal for gun lovers who want to build their own custom dedicated .40S&W  AR15 upper group. Machined to tight tolerances with quality as a top priority, you can't go wrong with the SD .40 cal barrel.

Note: All SD Barrels come with the locating pin installed.


  • Barrel length is measured in overall length.
  • Caliber: 40S&W.
  • Length: 8.5 Inches.
  • Made in the U.S.A.
  • Threaded .578-28.
  • 1:16 TWIST.
  • 4150 Chrome-molly steel.
  • Melonite coating.

3 Reviews Hide Reviews Show Reviews

  • 5
    SD BARREL .40SW, 8.5 INCH

    Posted by Robert Spears on Aug 13th 2022

    Well made, and accurate. 1 MOA at 25 yards.

  • 5

    Posted by John Quinn on May 16th 2022

    At this time the build is not complete, another review will come after a couple hundred have been sent through the barrel. The product looks well made, nice clean twist down the barrel. Time will tell. But never have had a problem with anything I have purchased from this company, plus quick shipping

  • 5
    .40S&W +P

    Posted by Ron Gilbert on Oct 24th 2019

    Knockemdoon. Consider what you run . +P .40s&W rounds run fantastic in this barrel. But, Don't forget and run +P in most of your side arms... Keep safe.