Davidson Defense Gyas 16-inch 1:10 9mm AR-9 Freefloat Tubular M-Lok Handguard Rifle Complete Upper Build

Gyas 16-inch 1:10 9mm AR-9 Complete Upper Build

This complete upper delivers a purpose-built 9mm platform with precision engineering. The 416R stainless steel barrel pairs with a freefloat M-LOK handguard to reduce vibration and improve consistency. You're getting a bolt carrier group, charging handle, and all upper components ready to pair with your lower receiver.

Key Features

• 416R stainless steel barrel with 1:10 twist rate for 9mm ammunition
• Freefloat tubular M-LOK handguard reduces barrel contact and improves accuracy
• 7075-T6 aluminum upper receiver with M4 feed ramps
• Nitride bolt carrier group compatible with Glock and Colt magazines
• 9mm A2 birdcage flash hider with 1/2x36 thread pitch
• AR-15 forward assist and ejection port door assembly included
• Suppressor ready handguard design

Perfect For

• 9mm AR platform builders seeking a complete upper assembly
• Shooters wanting a compact, controllable 9mm rifle configuration
• Builders prioritizing accuracy with a freefloat handguard setup
• Those planning suppressed shooting with compatible muzzle threading

Precision Barrel and Twist Rate

The 416R stainless steel barrel uses a 1:10 twist rate optimized for 9mm ammunition. This twist rate stabilizes typical 9mm projectiles across the common grain weights you'll encounter. The M4 profile keeps weight manageable while the stainless construction resists corrosion from frequent shooting or suppressed use.

Freefloat Handguard Advantage

The 15-inch tubular M-LOK handguard isolates the barrel from external pressure. Unlike traditional handguards that contact the barrel, freefloat designs eliminate that contact point, reducing vibration and improving shot consistency. The 1.77-inch internal diameter accommodates most aftermarket rail systems if you want to add accessories later.

Bolt Carrier Group and Magazine Compatibility

The nitride BCG uses 8620 alloy steel with an external extractor. This design cycles reliably with both Glock and Colt magazines, giving you flexibility in ammunition feeding. The nitride finish provides corrosion resistance and durability through extended use.

Complete Upper Assembly

This upper includes the charging handle and forward assist, so you have all components needed to attach to a lower receiver. The ejection port door assembly with rod and spring is installed and ready. The A2 birdcage flash hider threads at 1/2x36 pitch, standard for 9mm builds.

Follow safe handling and manufacturer instructions. Ensure compliance with all applicable federal, state, and local laws. Lower receiver not included. BCG and charging handle are not included.