DTT 'Mockingbird Gen 2' 6-inch AR-15 9mm Nitride Pistol Complete Upper Build Kit

DTT 'Mockingbird Gen 2' 6-Inch AR-15 9mm Nitride Pistol Complete Upper Build Kit

The Mockingbird Gen 2 Complete Upper is built around a 6-inch 9mm (9x19) barrel machined from 4150 chrome moly vanadium steel in a medium profile with a Nitride finish, paired with a 4-inch black M-LOK free-float handguard. It runs a direct blowback 9mm bolt carrier group and ships with a mil-spec quality M4 charging handle, so the builder receives the core components of a working AR-9 upper in one package. The short barrel and compact handguard keep the front end light and quick to handle, and the 1:10 twist suits a wide range of 9mm bullet weights.

Key Features

• 6-inch medium profile barrel, 4150 CrMoV steel, Nitride finish, 1:10 twist, 9mm (9x19)
• 6061-T6 billet aluminum upper receiver, Type III hard coat anodized
• 4-inch M-LOK free-float handguard, 6061-T6 aluminum
• AR-15 A2 GI birdcage flash hider on 1/2x28 threads with 1/2-inch black crush washer
• 9mm bolt carrier group, 8620 alloy steel carrier, Nitride finish, external extractor
• Compatible with Glock and Colt pattern magazines
• Mil-spec quality AR-15 M4 charging handle included

Barrel and Muzzle

The 6-inch barrel is machined from 4150 chrome moly vanadium steel in a medium profile and finished in Nitride, a surface treatment that adds hardness and corrosion resistance while leaving a clean, matte black look. Its 1:10 twist rate is suited to a wide range of 9mm bullet weights. The muzzle is threaded 1/2x28 and carries the included AR-15 A2 GI birdcage flash hider, secured with the supplied 1/2-inch black crush washer.

Upper Receiver and Handguard

The upper receiver is machined from 6061-T6 billet aluminum and finished in Type III hard coat anodizing, a hard, wear-resistant surface that resists scratches and corrosion. It is paired with a 4-inch M-LOK free-float handguard machined from 6061-T6 aluminum. As a free-float design, it leaves the barrel free of handguard contact, and the M-LOK slots give the builder room to mount lights, grips, handstops, and other accessories wherever the setup calls for them.

Bolt Carrier Group and Charging Handle

The included 9mm bolt carrier group features a carrier machined from 8620 alloy steel and finished in Nitride, which adds hardness and corrosion resistance and helps the carrier stand up to repeated cycling. It uses an external extractor and is compatible with Glock and Colt pattern magazines. Paired with it is a mil-spec quality AR-15 M4 charging handle, completing the upper so it is ready to be matched with a compatible lower receiver.

Compatibility

This upper is built for AR-9 platforms chambered in 9mm (9x19). Handguard attachment hardware, ejection port door and forward assist configuration, and the lower receiver magazine well pattern needed to match the Glock or Colt magazine style were not supplied with this listing and should be confirmed before purchase.

Follow all manufacturer instructions and safe handling practices.

Ensure compliance with all applicable federal, state, and local laws.