Davidson Defense Nine Runner 16-inch 1:10 9MM AR-9 Freefloat M-Lok Handguard Rifle Complete Upper Build

Nine Runner 16-inch 1:10 9mm AR-9 Freefloat M-LOK Handguard Rifle Complete Upper

The Nine Runner is a 9mm AR-9 Complete Upper built around a 16-inch direct blowback platform. The kit centers on a 16-inch M4 profile 416R stainless steel barrel with a 1:10 twist rate and 1/2x36 thread pitch, paired with a black A2 birdcage flash hider and a black 1/2-inch crush washer. The billet AR-15 upper receiver for pistol caliber builds is paired with a 15-inch freefloat M-LOK handguard featuring a full-length Picatinny top rail, integrated QD sling mounts, and no anti-rotation tabs. A complete 9mm nitride bolt carrier group in 8620 alloy steel with an external extractor compatible with Glock and Colt pattern magazines, and a Mil-Spec AR-15 M4 charging handle complete the upper component set.

Key Features

• 16-inch M4 profile 416R stainless steel barrel, 1:10 twist, 1/2x36 thread pitch, 9mm
• Direct blowback platform
• Black A2 birdcage flash hider, 1/2x36, black 1/2-inch crush washer included
• Billet AR-15 upper receiver for pistol caliber builds
• 15-inch freefloat M-LOK handguard, full-length Picatinny top rail, integrated QD sling mounts, no anti-rotation tabs
• Complete 9mm nitride bolt carrier group, 8620 alloy steel, external extractor, Glock and Colt pattern magazine compatible
• Mil-Spec AR-15 M4 charging handle

Perfect For

• AR-9 rifle builders sourcing a complete 9mm blowback upper with a billet pistol caliber upper receiver, 16-inch 416R stainless steel barrel, nitride BCG compatible with Glock and Colt pattern magazines, and 15-inch freefloat M-LOK handguard with full-length Picatinny top rail and integrated QD sling mounts ready to pair with their own lower receiver
• Shooters building a 16-inch 9mm direct blowback AR-9 rifle platform who want the AR-9 BCG and charging handle covered in one complete upper with a billet pistol caliber upper receiver and a freefloat M-LOK handguard with integrated QD sling mounts and full-length Picatinny top rail
• AR-9 PCC rifle builders who want a complete 9mm blowback upper with a Glock and Colt pattern magazine compatible BCG and a 15-inch freefloat M-LOK handguard without sourcing components separately

Barrel and Muzzle Device

The 16-inch M4 profile barrel is chambered in 9mm and constructed from 416R stainless steel with a 1:10 twist rate and 1/2x36 thread pitch, which matches the included black A2 birdcage flash hider. A black 1/2-inch crush washer is included. The direct blowback platform design addresses the 9mm cartridge in an AR-9 pistol caliber carbine build without a gas system.

Upper Receiver and Handguard

The billet AR-15 upper receiver for pistol caliber builds pairs with a 15-inch freefloat M-LOK handguard featuring a full-length Picatinny top rail, integrated QD sling mounts, and no anti-rotation tabs, with M-LOK attachment points along the body for accessory mounting. These two components define the exterior structure of the upper assembly on this AR-9 platform.

Bolt Carrier Group and Charging Handle

The complete 9mm nitride bolt carrier group is 8620 alloy steel with a nitride finish and features an external extractor compatible with both Glock and Colt pattern magazines. A Mil-Spec AR-15 M4 charging handle is included to complete the upper component set.

Follow safe handling and manufacturer instructions. Ensure compliance with all applicable federal, state, and local laws. Verify compatibility with your specific 9mm AR-9 lower receiver and magazine pattern before use.