• Sale
  • $ 589.59
  • Regular price $ 668.10


Stern Defense 7 inch KEYMOD rail(Barrel nut, shims, bolts etc.)
Stern Defense 6 inch 40SW barrel.
Stern Defense assembled upper receiver with dust cover and forward assist. 
Stern Defense SD BU40 Glock cut bolt. 
SD CH1 enhanced charging handle. 

Will come assembled. 



The free float KeyMod handguard from Stern Defense offers excellent ergonomics while remaining lightweight and strong. This handguard is KeyMod compatible to accept your favorite attachments. Features a secure clamp on mounting system that ensures that the handguard remains in place even under heavy abuse, sustained full auto fire, and shooting prone from a bi-pod. Machined from 6061 aircraft grade aluminum and hard-coat anodized for longevity and durability.

 Also Included, Shims, Barrel Nut and Bolts.

Technical Information:

⦁    6061 aircraft grade aluminum.

⦁    Hard-coat anodized.

⦁    Sturdy construction.

⦁    Light weight construction.

⦁    Length 7 inches.

⦁    Smallest inside diameter 1.435 inches.

⦁    Made in U.S.A.



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: 6 Inches.
  • Made in the U.S.A.
  • Threaded .578-28.
  • 1:16 TWIST.
  • 4150 Chrome-molly steel.
  • Melonite coating.


Mil-Spec flat top upper receiver with Stern Defense laser engraved dust cover and forward assist. Machined from 7075-t6 aluminum and hard-coat anodized. Mil-spec dry film lube in the bore.


Technical Information:

⦁    7075-t6 aluminum

⦁    Hard-coat anodized.

⦁    Sturdy construction.

⦁    Made in U.S.A.

Charging Handle.
Mil-spec charge handle for AR-15 rifles.  Laser engraved with Stern Defense logo.  Our latch is  Ergonomically designed and provides a positive grip and easy one hand manipulations while charging your weapon under stressful situations. Made from 6061 aircraft grade aluminum billet and hardcoat anodized.

Technical Information:

⦁    Laser engraved.

⦁    6061 aircraft grade aluminum billet

⦁    Hard coat anodized.

⦁    Sturdy Construction.

⦁    Made in U.S.A.


Made with 8620 AISI steel and boasting a Melonite finish, the Stern bolt fits into Mil-Spec and Glock-pattern upper receivers.  It functions with Colt SMG, Glock magazines and it's fully compatible with standard AR15/M16 charging handles. Comes fully assembled with all sub-components installed, including firing pin/spring/retaining pin, extractor, and extractor spring.   Also included in bolt assembly is a propriety center and roll pins.

Technical Information:

  •     Made in U.S.A.
  •     Constructed from 8620 AISI steel.
  •     Custom 4140 billet extractor providing superior ejection.
  •     Glock cut.
  •     Coating: Melonite
  •     Weight: 15.5 OZ.
  •     40SW


 Blast Can.

This unique blast can was designed for those who need a device that directs muzzle gasses and blast away from the shooter but want a can that matches the look of an handguard better than a round can. Machined from 6061 aircraft grade aluminum billet and hardcoat anodized. 3.25 inches long and 1.3 inches across the widest point.

Note: Comes with crush washer.

Technical Information:

  • 6061 aircraft grade aluminum.
  • Hard-coat anodized.
  • Sturdy construction.
  • Light weight construction.
  • Made in U.S.A.
  • .45 CAL
  • Threaded .578-28


All S.D. .40S&W barrels are threaded with .45 CAL threads (.578-28) to accept .45 CAL muzzle devices.

Comes with crush washer.



Convert your standard mil spec AR 15, M4, M16 lower assembly to use 9mm and .40 S&W Glock Magazines!  The Mag-AD series adapters install in seconds.  Boasting a last round hold open feature making them a breakthrough product and a must-have for law enforcement and civilian gun enthusiasts alike.

The Stern Mag-AD9 series adapters are made of aircraft grade aluminum, lightweight with ergonomic design.   

Technical Information:

⦁    Made in the U.S.A.

⦁    Constructed from 6061 T6 aircraft grade aluminum.

⦁    4140 NiB coated feed ramp.

⦁    Hard coat anodized type 3.

⦁    Sturdy Construction.

⦁    Ergonomic mag release.

⦁    Works with all generations of Glock magazines.

⦁    Works with any mil spec ar15 lower receiver.

⦁     All gun components besides the Bolt and Barrel remain stock


Please visit the following link before purchasing to ensure compatibility with your setup.