DTT The Opener 16.5-inch Mid-Gas 1:7 5.56 NATO AR-15 Freefloat M-Lok Handguard Rifle Upper Build Kit

The Opener 16.5 Inch 5.56 NATO AR-15 Rifle Upper Build Kit with Free Float M-LOK Handguard

The Opener AR-15 Rifle Upper Build Kit pairs a 3rd Gen Tactical upper receiver with a dished Picatinny rail, a 16.5 inch 4150 chrome moly vanadium barrel in 5.56x45mm NATO, and a black aircraft-grade aluminum free float M-LOK handguard. The upper receiver is 7075-T6 aluminum with an anodized finish. The barrel has a nitride finish, a medium profile, a 1 in 7 twist rate, and a half inch x 28 thread pitch, and it uses a mid length gas system with a .750 gas block journal. A GI birdcage flash hider rounds out the kit, and BCG and charging handle are not included.

Key Features

• 3rd Gen Tactical upper receiver with dished Picatinny rail
• 7075-T6 aluminum, anodized
• 16.5 inch barrel, 4150 chrome moly vanadium
• Nitride finish, medium profile
• 1 in 7 twist rate
• Half inch x 28 thread pitch
• .750 gas block journal
• Free float M-LOK handguard, aircraft-grade aluminum, black
• GI birdcage flash hider, half inch x 28
• 5.56x45mm NATO
• BCG and charging handle not included

Perfect For

• AR-15 rifle builders who want a 16.5 inch upper receiver, barrel, and handguard in one purchase
• Builders who already have a bolt carrier group and charging handle on hand
• Shooters who want a slightly longer barrel than a standard 16 inch rifle

3rd Gen Tactical Upper Receiver

The 3rd Gen Tactical upper receiver is 7075-T6 aluminum with an anodized finish. It features a dished Picatinny rail along the top. The receiver is the foundation of the upper side of this kit. It pairs with the free float M-LOK handguard up front.

16.5 Inch Nitride Medium Profile Barrel

The barrel is a 16.5 inch barrel made from 4150 chrome moly vanadium in 5.56x45mm NATO. It carries a nitride finish with a medium profile and a 1 in 7 twist rate. The barrel runs a mid length gas system with a .750 gas block journal. The muzzle uses a half inch x 28 thread pitch.

Free Float M-LOK Handguard and GI Flash Hider

The handguard is a black aircraft-grade aluminum free float M-LOK design. M-LOK slots give room for lights, grips, and other accessories. A GI birdcage flash hider threaded half inch x 28 is included. It covers the muzzle hardware for the barrel.

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, bolt carrier group, and gas block before use.

Inspect all components before use.