The Stern Defense 9mm Complete Upper (brand part number 015-SD15MOD4MLOK1619MMKK) pairs a 16.1-inch black Melonite-finished barrel with a 15-inch M-LOK free-float rail, giving builders a rifle-length 9mm upper ready to drop onto a standard AR15 lower. The assembled upper receiver comes complete with a dust cover and forward assist, along with Stern Defense’s own SCB 9 compensator brake, SD BU9 Glock-cut bolt, and CH1 enhanced charging handle. Because the 16.1-inch barrel clears the federal 16-inch rifle minimum, this upper can be paired with a standard rifle-configured, stocked lower without any NFA registration.

Key Specifications

• Barrel length is 16.1 inches, finished in black Melonite for corrosion resistance.
• Chambered in 9mm.
• Rifling twist rate is 1:10.
• Handguard is a 15-inch M-LOK free-float rail.
• Bolt is Stern Defense’s SD BU9 Glock-cut bolt.
• Includes the SCB 9 compensator brake and CH1 enhanced charging handle.
• Sold as a complete assembled upper with dust cover and forward assist installed.

Frequently Asked Questions

Does this include a lower receiver? No, it is sold as a complete upper only; no lower receiver is included.

Can I run this on a standard rifle lower with a stock? Yes, the 16.1-inch barrel clears the federal 16-inch rifle minimum, so it can be paired with a standard stocked lower without NFA registration.

What bolt does it use? It uses Stern Defense’s own SD BU9 Glock-cut bolt.

Buy the Stern Defense 9mm Complete Upper

Get a ready-to-run, rifle-length 9mm upper for your next build. Shop more Stern Defense uppers in our AR15 uppers selection, and order this upper from our Lubbock, Texas gun shop.