Davidson Defense Garrison 16-inch 1:10 9MM AR-9 Tubular M-Lok Handguard Rifle Complete Upper Build

Garrison 16-inch 1:10 9mm AR-9 Freefloat Tubular M-LOK Rifle Complete Upper

The Garrison is a 9mm AR-9 Complete Upper built around a 16-inch direct blowback platform. The kit centers on a 16-inch 4150 CrMoV steel barrel with a nitride finish, 1:10 twist rate, and 1/2x36 thread pitch, paired with a 9mm A2 birdcage flash hider and a black 1/2-inch crush washer. The 7075-T6 aluminum anodized upper receiver features M4 feed ramps, a forward assist, and an ejection port door assembly, paired with a 15-inch aluminum tubular freefloat M-LOK handguard with a 1.77-inch internal diameter and suppressor-ready clearance. 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 4150 CrMoV steel barrel, nitride finish, 1:10 twist, 1/2x36 thread pitch, 9mm
• Direct blowback platform
• 9mm A2 birdcage flash hider, 1/2x36, black 1/2-inch crush washer included
• 7075-T6 aluminum upper receiver, anodized, M4 feed ramps, forward assist, ejection port door assembly
• 15-inch aluminum tubular freefloat M-LOK handguard, 1.77-inch internal diameter, suppressor-ready clearance
• 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 16-inch nitride 4150 CrMoV barrel, 7075-T6 anodized upper receiver with forward assist, 15-inch aluminum tubular freefloat M-LOK handguard with suppressor-ready clearance, and nitride BCG compatible with Glock and Colt pattern magazines 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 an anodized upper receiver and suppressor-ready tubular freefloat M-LOK handguard
• 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 aluminum tubular freefloat M-LOK handguard with suppressor-ready clearance without sourcing components separately

Barrel and Muzzle Device

The 16-inch 4150 CrMoV steel barrel is chambered in 9mm with a nitride finish. The twist rate is 1:10 and the thread pitch is 1/2x36, which matches the included 9mm 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 rifle caliber build without a gas system.

Upper Receiver and Handguard

The 7075-T6 aluminum upper receiver carries an anodized finish with M4 feed ramps, a forward assist, and an ejection port door assembly. The 15-inch aluminum tubular freefloat M-LOK handguard features a 1.77-inch internal diameter with suppressor-ready clearance and 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.