The Stern Defense 9mm Pistol Upper (brand part number S01577) is a complete, assembled AR-platform upper chambered in 9mm with a 6-inch Melonite-finished steel barrel and an 8-inch MOD 5 M-LOK handguard. It includes the bolt carrier group and is Glock-cut and ready for Glock-pattern magazine wells, whether run on a Glock-cut lower or with Stern Defense’s own adapters. Rounding out the package is Stern Defense’s SD HBC 9mm blast can and a laser-engraved charging handle, all made in the USA to a tight, complete-and-ready-to-run standard.

Key Specifications

• Barrel length is 6 inches, chambered in 9mm.
• Rifling twist rate is 1:10.
• Barrel material is steel, finished in Melonite for wear resistance.
• Handguard is an 8-inch MOD 5 M-LOK design.
• Compatible with Glock-cut lowers or Stern Defense adapters for Glock-pattern magazines.
• Includes the SD HBC 9mm blast can and a laser-engraved charging handle.
• Manufactured in the USA.

Frequently Asked Questions

What magazines does this upper work with? It is Glock-cut and ready for Glock-pattern magazines when paired with a Glock-cut lower or Stern Defense adapters.

Does it come as a complete, ready-to-run upper? Yes, it is a complete assembled upper including the bolt, blast can, and charging handle.

Is a 6-inch barrel legal without an SBR registration? Yes, it ships as an upper only with no lower receiver; installing it on a shouldered, stocked lower would require a registered SBR, so keep it on a pistol-configured build.

Buy the Stern Defense 9mm Pistol Upper

Get a ready-to-run, Glock-mag-compatible 9mm upper for your next pistol build. Shop more Stern Defense uppers in our AR15 uppers selection, and this upper ships fast from our Lubbock, Texas gun shop.