Davidson Defense Warden 16-inch 1:10 9MM AR-15 Freefloat Keymod Handguard Rifle Complete Upper Build, 9mm 5.5 oz Buffer, ExoMag 40 Round Magazine

Davidson Defense Warden 16 Inch Complete Upper in 9MM with Keymod Handguard and 40 Round ExoMag

This Davidson Defense Warden complete upper pairs a 16 inch barrel with a blowback pistol caliber system for reliable performance in 9MM. The upper receiver is machined from 7075-T6 aluminum and anodized for strength and durability. The 15 inch Keymod handguard is made from 6061-T6 aluminum with Type III hard coat anodizing in black and gives you attachment points across three sides while keeping the top rail open. The barrel is made from 4150 Chrome Moly Vanadium steel with a nitride finish and comes threaded at 1/2x36 TPI with a standard A2 birdcage flash hider already mounted. The 1:10 twist rate stabilizes common 9MM projectile weights from 115 to 147 grains. This complete upper includes a nitride finished 9MM bolt carrier group made from 8620 alloy steel compatible with Glock and Colt magazines, charging handle, 5.5 oz lightweight buffer, and a 40 round ExoMag polymer magazine compatible with standard AR-15 lower receivers.

Key Features

• 16 inch barrel in 4150 Chrome Moly Vanadium steel with nitride finish and 1:10 twist rate
• Upper receiver machined from 7075-T6 aluminum with Type III anodizing
• 15 inch freefloat Keymod handguard made from 6061-T6 aluminum with Type III hard coat anodizing
• Threaded muzzle at 1/2x36 TPI with A2 birdcage flash hider installed
• Nitride finished 9MM bolt carrier group made from 8620 alloy steel compatible with Glock and Colt magazines
• Charging handle, 5.5 oz lightweight buffer, and 40 round ExoMag included

Perfect For

• Builders prioritizing 16 inch barrel length with Keymod attachment system
• Shooters looking for extended capacity with the 40 round magazine
• Those wanting a lightweight setup with extended handguard coverage
• Anyone building a pistol caliber carbine that uses standard AR-15 lower receivers

7075-T6 Upper Receiver Construction

The upper receiver is machined from 7075-T6 aluminum rather than the more common 6061-T6 alloy. The 7075 alloy offers higher tensile strength and better resistance to wear under stress, which makes it well suited for the blowback operation typical of AR-9 platforms. The anodized finish resists corrosion and provides a hard surface that holds up to repeated cycling. This upper pairs with standard AR-15 lower receivers when used with the included ExoMag system.

Barrel Performance in 9MM

A 16 inch barrel provides the maximum velocity potential for 9MM while maintaining a manageable overall length. The 1:10 twist rate stabilizes bullets from 115 grain FMJ training rounds up to 147 grain subsonic loads without overstabilizing lighter projectiles. The nitride finish on the 4150 Chrome Moly Vanadium steel adds surface hardness and corrosion resistance while reducing friction during firing. This barrel length delivers full powder burn and consistent velocities across different ammunition types.

Keymod Handguard Design

The 15 inch Keymod handguard is made from 6061-T6 aluminum with Type III hard coat anodizing for added resilience. The Keymod system uses keyhole shaped slots for accessory attachment rather than M-Lok or Picatinny rails. Keymod accessories lock into these slots at multiple positions along the handguard. The freefloat design keeps the barrel mounting area clear and the extended 15 inch length provides ample space for accessory attachment along the barrel. The lightweight aluminum construction keeps the overall weight manageable.

9MM Bolt Carrier Group and Magazine Compatibility

The nitride finished bolt carrier group is made from 8620 alloy steel and is compatible with both Glock pattern and Colt pattern magazines when used with the appropriate magwell adapter or AR-9 lower. This BCG uses a blowback system rather than a gas impingement system. The nitride coating adds hardness and reduces friction for smoother cycling and easier cleanup. The charging handle completes the upper assembly.

ExoMag System and Extended Capacity

The included 40 round ExoMag is a polymer magazine designed to work with standard AR-15 lower receivers rather than requiring a dedicated AR-9 lower. This system allows you to use a standard AR-15 lower with 9MM ammunition by using the ExoMag as the interface between the lower and the pistol caliber upper. The ExoMag inserts into the standard AR-15 magazine well and feeds 9MM cartridges to the bolt carrier group. The 40 round capacity ensures ample capacity for extended shooting sessions.

This setup makes caliber swapping straightforward. You can switch between 9MM and standard AR-15 calibers by swapping the upper, changing the buffer, and using the appropriate magazine. No dedicated lower receiver required. The 5.5 oz lightweight buffer is designed for pistol caliber blowback operation and provides reliable cycling.

Follow safe handling and manufacturer instructions. Ensure compliance with all applicable laws. Verify compatibility with your lower receiver and other components before assembly. This complete upper uses the ExoMag system and is designed to work with standard AR-15 lower receivers rather than dedicated AR-9 lowers.