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.
Information:

• 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.