Stern Defense’s AR-15 pistol 9mm complete upper receiver assembly is built for reliable performance with a 4-inch threaded barrel and a free-float M-LOK hand guard. The laser-engraved charging handle and matte black finish provide a clean, durable setup for your 9mm AR-15 pistol build.

Key features

• 4-inch 9mm Luger barrel with 1:10 twist rate
• Threaded 1/2x36 barrel for compatible muzzle devices
• Free-float M-LOK hand guard for a stable shooting platform and easy accessory mounting
• Laser-engraved charging handle
• Matte black finish for a low-profile, durable appearance

Add this Stern Defense 9mm complete upper to build or upgrade your AR-15 pistol setup with a compact 4-inch configuration.