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Stern Defense SD .40SW AR-15 Barrel Threaded Up to 21% Off w/ Free Shipping — 5 models

Special offer available for this product. Click here to see!
Stern Defense SD .40SW AR-15 Barrel, 4in, .578-28 TPI, 1-16 Twist Rate, Black, 006-40SW BR4IN-D1-M
Stern Defense SD .40SW AR-15 Barrel, 6in, .578-28 TPI, 1-16 Twist Rate, Black, 006-40SW BR6IN-D1-M
Stern Defense SD .40SW AR-15 Barrel, 8.5in, .578-28 TPI, 1-16 Twist Rate, Black, 006-40SW BR8.5IN-D1-M
Stern Defense SD .40SW AR-15 Barrel, 10.5in, .578-28 TPI, 1-16 Twist Rate, Black, 006-40SW BR10.5IN-D1-M
Stern Defense SD .40SW AR-15 Barrel, 16.1in, .578-28 TPI, 1-16 Twist Rate, Black, 006-40SW BR16.1IN-D1-M
Stern Defense SD .40SW AR-15 Barrel, 4in, .578-28 TPI, 1-16 Twist Rate, Black, 006-40SW BR4IN-D1-M
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Stern Defense SD .40SW AR-15 Barrel, 4in, .578-28 TPI, 1-16 Twist Rate, Black, 006-40SW BR4IN-D1-M
Stern Defense SD .40SW AR-15 Barrel, 6in, .578-28 TPI, 1-16 Twist Rate, Black, 006-40SW BR6IN-D1-M
2 of 5 images
Stern Defense SD .40SW AR-15 Barrel, 6in, .578-28 TPI, 1-16 Twist Rate, Black, 006-40SW BR6IN-D1-M
Stern Defense SD .40SW AR-15 Barrel, 8.5in, .578-28 TPI, 1-16 Twist Rate, Black, 006-40SW BR8.5IN-D1-M
3 of 5 images
Stern Defense SD .40SW AR-15 Barrel, 8.5in, .578-28 TPI, 1-16 Twist Rate, Black, 006-40SW BR8.5IN-D1-M
Stern Defense SD .40SW AR-15 Barrel, 10.5in, .578-28 TPI, 1-16 Twist Rate, Black, 006-40SW BR10.5IN-D1-M
4 of 5 images
Stern Defense SD .40SW AR-15 Barrel, 10.5in, .578-28 TPI, 1-16 Twist Rate, Black, 006-40SW BR10.5IN-D1-M
Stern Defense SD .40SW AR-15 Barrel, 16.1in, .578-28 TPI, 1-16 Twist Rate, Black, 006-40SW BR16.1IN-D1-M
5 of 5 images
Stern Defense SD .40SW AR-15 Barrel, 16.1in, .578-28 TPI, 1-16 Twist Rate, Black, 006-40SW BR16.1IN-D1-M

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Customer Reviews
Most Recent Reviews
Very nice barrel. by Zack856, Verified Owner, January 24, 2026
Chamber is good. Rifling is crisp with no chattering. They definitely put some thought into the feed ramp. It's fully supported but still slick and smooth. .45 muzzle device fits perfectly. Came extremely overpackaged and even the most hate filled ma...
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Most Recent Reviews
40 Cal AR barrel by Gary Stiles, Verified Owner, February 5, 2025
I bought this barrel for a 40 S&W AR build. Just completed yesterday and it shoots really well. These barrels are a little harder to find that 9mm or 223. Optic Planet has them in stock and they ship pretty quickly.
Most Recent Reviews
40 Cal AR barrel by Gary Stiles, Verified Owner, January 29, 2025
I purchased this barrel to build an AR carbine in 40 Smith & Wesson. This caliber is either hard to find or rather expensive. Optics Planet had a few different manufacturers and good selection on barrel lengths with reasonable pricing.
Read All 3 Reviews
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Product Info for Stern Defense SD .40SW AR-15 Barrel Threaded

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.image

Specifications for Stern Defense SD .40SW AR-15 Barrel Threaded:

Manufacturer: Stern Defense
Color: Black
Fabric/Material: 4150 Chrome-molly Steel
Caliber: .40 S&W
Barrel Profile: Light Weight
Barrel Twist Rate: 1-16
Gun Make: AR Platform
Gun Model: AR-15
Firearms Threads Per Inch: .578x28

Package Contents:

  • Stern Defense SD .40SW AR-15 Barrel Threaded

What firearm models does the manufacturer say Stern Defense SD .40SW AR-15 Barrel Threaded is compatible with?

The manufacturer suggests that Stern Defense SD .40SW AR-15 Barrel Threaded is compatible with AR-15

Stern Defense SD .40SW AR-15 Barrel Threaded Orderable Models

List of Orderable Models

  • Stern Defense SD .40SW AR-15 Barrel, 16.1in, .578-28 TPI, 1-16 Twist Rate, Black, 006-40SW BR16.1IN-D1-M , MPN: 006-40SW BARREL16.1INCH-D1-M , UPC: 850001176712 , Code: 3JS-ATB-SD10-006-40SW-BR16-1IN-D1-M
  • Stern Defense SD .40SW AR-15 Barrel, 6in, .578-28 TPI, 1-16 Twist Rate, Black, 006-40SW BR6IN-D1-M , MPN: 006-40SW BARREL6INCH-D1-M , UPC: 850001176682 , Code: 3JS-ATB-SD10-006-40SW-BR6IN-D1-M
  • Stern Defense SD .40SW AR-15 Barrel, 8.5in, .578-28 TPI, 1-16 Twist Rate, Black, 006-40SW BR8.5IN-D1-M , MPN: 006-40SW BARREL8.5INCH-D1-M , UPC: 850001176668 , Code: 3JS-ATB-SD10-006-40SW-BR8-5IN-D1-M
  • Stern Defense SD .40SW AR-15 Barrel, 10.5in, .578-28 TPI, 1-16 Twist Rate, Black, 006-40SW BR10.5IN-D1-M , MPN: 006-40SW BARREL10.5INCH-D1-M , UPC: 850001176705 , Code: 3JS-ATB-SD10-006-40SW-BR10-5IN-D1-M
  • Stern Defense SD .40SW AR-15 Barrel, 4in, .578-28 TPI, 1-16 Twist Rate, Black, 006-40SW BR4IN-D1-M , MPN: 006-40SW BARREL4INCH-D1-M , UPC: 850001176675 , Code: 3JS-ATB-SD10-006-40SW-BR4IN-D1-M
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