Davidson Defense 'Mockingbird Gen 3' 9MM Upper Build Kit

Mockingbird Gen 3 9mm AR-9 Upper Build Kit with Davidson Defense Upper Receiver and Air Lite Series Honeycomb Handguard

The Mockingbird Gen 3 9mm Upper Build Kit pairs the Davidson Defense 9mm Billet Upper Receiver with a 6 inch 4150 CrMoV barrel in 9mm and a 4 inch Air Lite Series Honeycomb free float M-LOK handguard. The barrel has a nitride finish, a medium profile, a 1 in 10 twist rate, and a half inch x 28 thread pitch. An Omega Mfg A2 birdcage flash hider rated for 5.56, .223, 9mm, and .350 and a black crush washer round out the muzzle end. BCG and charging handle are not included.

Key Features

• Davidson Defense 9mm Billet Upper Receiver, 6061 aluminum
• 6 inch barrel, 4150 CrMoV
• Nitride finish, medium profile
• 1 in 10 twist rate
• Half inch x 28 thread pitch
• 4 inch Air Lite Series Honeycomb free float M-LOK handguard
• Monolithic top rail, black anodized
• Omega Mfg A2 birdcage flash hider, half inch x 28
• Flash hider compatible with 5.56, .223, 9mm, and .350
• Half inch black crush washer
• 9mm, AR-15 and AR-9 platform
• BCG and charging handle not included

Perfect For

• AR-9 pistol builders who want the upper receiver, barrel, and handguard together in one purchase
• Builders who already have a 9mm bolt carrier group and charging handle on hand
• Shooters who want a honeycomb handguard on a compact 9mm AR pistol

Davidson Defense 9mm Upper Receiver

The Davidson Defense 9mm Billet Upper Receiver is made for 9mm AR builds. It is made from 6061 aluminum. The receiver is the foundation of the upper side of this kit. It pairs with the Air Lite Series Honeycomb handguard up front.

6 Inch Nitride 9mm Barrel

The barrel is a 6 inch 9mm barrel made from 4150 CrMoV with a nitride finish. It uses a medium profile and a 1 in 10 twist rate. The muzzle uses a half inch x 28 thread pitch, the common thread for 9mm AR barrels. The short barrel keeps the AR-9 compact.

Air Lite Series Honeycomb Handguard and Omega Mfg Flash Hider

The Air Lite Series Honeycomb handguard measures 4 inches with a free float M-LOK design and a monolithic top rail in black anodized finish. The honeycomb cutout pattern gives the short front end a distinct look. An Omega Mfg A2 birdcage flash hider threaded half inch x 28 is included and is compatible with 9mm. A half inch black crush washer rounds out the muzzle hardware.

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 lower receiver, 9mm bolt carrier group, and magazines before use.

Inspect all components before use.