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

Nine Runner 16-inch 1:10 9mm AR-9 Freefloat M-LOK Handguard Rifle Full Build Kit

The Nine Runner is a 9mm AR-9 Full Build Kit 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 calibers 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 side. The lower hardware includes a complete Mil-Spec AR-15 lower parts kit, a Mil-Spec heavy-duty 6-position aluminum carbine buffer tube, an AR-15 9mm carbine buffer, a USA-made standard AR-15 carbine recoil spring, a Mil-Spec AR-15 M16 receiver end plate, and a Mil-Spec AR-15 carbine castle nut. The SOPMOD style collapsible stock in black with storage compartments and integrated QD sling mounts rounds out the kit. Lower receiver not included.

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 calibers
• 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
• Complete Mil-Spec AR-15 lower parts kit
• Mil-Spec heavy-duty 6-position aluminum carbine buffer tube
• AR-15 9mm carbine buffer
• Standard AR-15 carbine recoil spring, made in USA
• Mil-Spec AR-15 M16 receiver end plate
• Mil-Spec AR-15 carbine castle nut
• SOPMOD style collapsible stock, black, storage compartments, integrated QD sling mounts

Perfect For

• AR-9 rifle builders sourcing a complete 9mm blowback full build kit with a billet pistol caliber upper receiver, 16-inch 416R stainless steel barrel, 15-inch freefloat M-LOK handguard with integrated QD sling mounts, and SOPMOD collapsible stock with storage compartments and QD sling mounts already included, pairing it with their own lower receiver
• Shooters building a 16-inch 9mm direct blowback AR-9 rifle platform who want the AR-9 BCG, charging handle, complete lower parts kit, and SOPMOD collapsible stock with storage covered in one kit with a full-length Picatinny top rail handguard and integrated QD sling mounts
• AR-9 PCC rifle builders who want a complete blowback full build kit with a Glock and Colt pattern magazine compatible BCG and a SOPMOD collapsible stock with integrated QD sling mounts 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 calibers 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.

Lower Parts Kit and Buffer System

The complete Mil-Spec AR-15 lower parts kit covers the internal lower receiver components. The buffer system includes a Mil-Spec heavy-duty 6-position aluminum carbine buffer tube, an AR-15 9mm carbine buffer, a USA-made standard AR-15 carbine recoil spring, a Mil-Spec AR-15 M16 receiver end plate, and a Mil-Spec AR-15 carbine castle nut. The SOPMOD style collapsible stock in black features storage compartments and integrated QD sling mounts, pairing with the included Mil-Spec carbine buffer tube and covering the rear stock interface for this AR-9 rifle lower build kit.

Follow safe handling and manufacturer instructions. Ensure compliance with all applicable federal, state, and local laws. Lower receiver not included. Verify compatibility with your specific 9mm AR-9 lower receiver and magazine pattern before use.