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

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

The Garrison is a 9mm AR-9 Upper Build Kit 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. BCG and charging handle are not included.

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
• BCG and charging handle not included

Perfect For

• AR-9 rifle builders sourcing a 9mm upper build kit with a 16-inch nitride 4150 CrMoV barrel, 7075-T6 anodized upper receiver with forward assist, and 15-inch aluminum tubular freefloat M-LOK handguard with suppressor-ready clearance, pairing it with their own AR-9 bolt carrier group and charging handle
• Shooters building a 16-inch 9mm direct blowback AR-9 rifle platform who prefer to select their own BCG while having the nitride 4150 CrMoV barrel, anodized upper receiver with M4 feed ramps and forward assist, and suppressor-ready tubular freefloat M-LOK handguard covered in one kit
• AR-9 PCC rifle builders who want a 9mm upper build kit with a 15-inch aluminum tubular freefloat M-LOK handguard featuring suppressor-ready clearance and a 1.77-inch internal diameter 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.

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