The Davidson Defense The Closer 16-inch AR-9 9MM Rifle Upper Build Kit is built on an AR-9 platform and features a 16-inch barrel crafted from 4150 Chrome Moly Vanadium steel with a nitride finish. The H-Bar profile and a 1:10 twist rate is paired with a standard 1/2x36 thread pitch allows for flexibility in muzzle device choices. The upper receiver is a Billet Upper made from 6061-T6 aluminum, finished with Type III Hardcoat Anodizing. The handguard is a 15-inch free float quad rail made from aircraft-grade aluminum, featuring a versatile Picatinny attachment system. This kit includes an A2 Birdcage muzzle device with five ports, providing effective recoil management.
Platform: AR-9
Caliber: 9mm (9x19)
Barrel Length: 16 inches
Barrel Material: 4150 Chrome Moly Vanadium
Barrel Finish: Nitride
Barrel Profile: H-Bar
Twist Rate: 1:10
Thread Pitch: 1/2x36
Receiver Name: AR-15 Billet Upper Receiver for Pistol Calibers
Receiver Material: Billet 6061-T6 Aluminum
Receiver Finish: Type III Hardcoat Anodized
Handguard Material: Aircraft-Grade Aluminum
Handguard Color: Black
Handguard Style: Free Float Quad Rail
Handguard Length: 15 inches
Attachment System: Picatinny / Quad Rail
Muzzle Device Type: A2 Birdcage
Muzzle Device Ports: 5
Muzzle Device Finish: Stainless
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