Stern Defense SD10 Mod5 9mm Luger 8.5" Barrel 10" M-LOK AR-15 Pistol Upper

The Stern Defense SD10 Mod5 is a complete AR-15 pistol upper assembly chambered in 9mm Luger, purpose-built for compact 9mm pistol-caliber AR builds. The package pairs a short 8.5" barrel with a 10" M-LOK free-float handguard to deliver a lightweight, highly maneuverable upper for close-quarters applications and PCC-style shooting.

Designed by Stern Defense to drop onto a standard AR-15 lower receiver (lower sold separately), the SD10 Mod5 provides a clean, turnkey package for shooters building a dedicated 9mm AR pistol or pistol-caliber carbine. The 10" M-LOK handguard offers generous rail real estate for mounting lights, lasers, foregrips, and other accessories while keeping the front end light and trim, making this upper an ideal foundation for compact 9mm AR pistol configurations.

This listing is for a complete upper assembly sold as a firearm parts/accessory item. The lower receiver, bolt carrier group, magazine, and any small parts are not included. Add your own components to complete your 9mm AR pistol build to your preferred specification.