The Opener 16.5-inch AR-15 5.56 NATO Rifle Upper Build Kit from DTT features a 7075-T6 aluminum upper receiver paired with a 16.5-inch 4150 Chrome Moly Vanadium barrel. The barrel offers a 1:7 twist rate and a mid-length gas system. The barrel is finished with a nitride coating. The kit includes an M-Lok handguard made of aircraft-grade aluminum, providing a robust platform for accessories. The standard 1/2x28 muzzle thread pitch allows for compatibility with most muzzle devices, including the GI Birdcage Flash Hider.
Platform: AR-15
Caliber: 5.56x45mm NATO
Barrel Material: 4150 Chrome Moly Vanadium
Barrel Thread Pitch: 1/2x28
Barrel Gas System Length: Mid-Length
Barrel Length: 16.5 inches
Barrel Finish: Nitride
Barrel Profile: Medium
Barrel Twist Rate: 1:7
Receiver: 3rd Gen Tactical w/ Dished Pic Rail
Receiver Material: 7075-T6 Aluminum
Receiver Finish: Anodized
Handguard Material: Aircraft-Grade Aluminum
Handguard Color: Black
Handguard Style: M-Lok
Gas Block Size: 0.75
Muzzle Device Details: GI Birdcage Flash Hider
Muzzle Device: Flash Hider
Muzzle Thread Pitch: 1/2x28
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