Stern Defense MOD5 9mm 8.5in Upper, 10in M-LOK Rail

The Stern Defense MOD5 upper is an assembled 9mm upper receiver built for compact pistol-caliber AR platforms and pistol builds. It ships complete with an 8.5in Melonite-finished steel barrel and a 10in MOD 5 M-LOK handguard to provide a compact, configurable platform. The upper includes a Glock-cut bolt, dust cover, forward assist, SD HBC 9mm blast can, and an SD CH1 enhanced charging handle. The receiver is manufactured from 7075-T6 aluminum with an anodized finish and the assembly is made in the U.S.A.

Key Specifications

• The caliber is 9mm.
• The barrel length is 8.5 inches.
• The barrel material is steel.
• The barrel finish is Melonite.
• The rate of twist is 1:10″.
• The muzzle is threaded to .5-36 for compatible devices.
• The handguard is a 10-inch Mod 5 M-LOK design for modular accessory mounting.
• The package includes a Glock-cut bolt and related bolt components.
• This upper includes an SD HBC 9mm blast can and an SD CH1 enhanced charging handle.
• The receiver is made of 7075-T6 aluminum with an anodized finish and is Made in the USA.

This MOD5 upper is intended for builders and shooters seeking a compact, factory-assembled 9mm upper that balances modularity and manufacturing quality. Its short barrel and M-LOK handguard support reduced overall length without sacrificing mounting options, while the included bolt, blast can, and enhanced charging handle simplify installation and initial setup. The combination of a Melonite-treated steel barrel and a 7075-T6 anodized receiver provides durable corrosion resistance and functional longevity for a variety of pistol-caliber AR configurations.