Davidson Defense Left-Handed Labyrinth 8.5-inch Pistol-Gas 1:7 5.56 NATO AR-15 Freefloat Tubular Handguard Pistol Complete Upper Build

Left-Handed Labyrinth 8.5-Inch Pistol-Gas 1-7 5.56 NATO AR-15 Freefloat Tubular Handguard Pistol Complete Upper

This is a complete left-handed AR-15 upper chambered in 5.56 NATO, built around an 8.5-inch M4 contour steel barrel with a 1-7 twist rate and a pistol-length gas system. The Black Diamond Series left-handed slick side billet aluminum upper receiver with a black anodized finish anchors the front end with a left-hand ejection port and a clean slick side exterior that omits the forward assist and dust cover from the receiver body. The pistol-length gas tube and micro low-profile steel gas block at .750 O.D. complete the gas system, and the 7-inch freefloat smooth handguard covers the compact forend. An A2 GI Birdcage flash hider at 1-2x28 closes out the muzzle end. A Davidson Defense premium left-handed M16 nitride bolt carrier group and a Mil-Spec M4 charging handle complete the upper component set.

Key Features

• 5.56 NATO chambering, 8.5-inch M4 contour steel barrel, 1-7 twist rate
• Pistol-length gas system with pistol-length gas tube
• Micro low-profile steel gas block, .750 O.D.
• Black Diamond Series left-handed slick side billet aluminum upper receiver, black anodized, no forward assist, no dust cover
• 7-inch freefloat smooth handguard
• Davidson Defense premium left-handed M16 bolt carrier group, nitride finish
• Mil-Spec AR-15 M4 charging handle
• A2 GI Birdcage flash hider, 1-2x28 thread pitch
• Black 1-2-inch crush washer

Perfect For

• Left-handed AR-15 pistol builders pairing a complete 5.56 NATO upper with an existing lower configured for left-hand operation
• Shooters adding a left-handed 8.5-inch pistol-gas upper to an AR-15 lower they already own
• Left-handed builders who want a Davidson Defense left-handed M16 nitride BCG and a clean slick side billet upper with a smooth tubular handguard in one complete compact upper assembly

Upper Receiver and Barrel

The Black Diamond Series left-handed slick side billet aluminum upper receiver with a black anodized finish anchors the front end with a left-hand ejection port and a clean slick side exterior profile that omits both the forward assist and the dust cover from the receiver body, giving the upper a streamlined and minimal appearance suited to compact pistol-length builds. The 8.5-inch M4 contour steel barrel brings a 1-7 twist rate to the 5.56 NATO chamber, threaded at 1-2x28. The pistol-length gas tube and micro low-profile steel gas block at .750 O.D. run a pistol-length gas system along the 8.5-inch barrel. The 7-inch freefloat smooth handguard surrounds the barrel and gas system along the compact forend with a smooth exterior profile that omits slots or rail sections for a clean uninterrupted handguard surface.

Bolt Carrier Group and Charging Handle

The Davidson Defense premium left-handed M16 bolt carrier group carries a nitride finish and is a purpose-built left-hand BCG designed to function with the left-handed upper receiver and eject cases from the left side of the build. The Mil-Spec M4 charging handle pairs with the BCG inside the upper receiver to complete the upper interior. These two components complete the upper component set alongside the upper assembly, barrel, and handguard.

Muzzle Device

The A2 GI Birdcage flash hider threads onto the 1-2x28 muzzle end of the barrel. The included black 1-2-inch crush washer seats at the barrel shoulder and completes the muzzle hardware for this upper.

Follow safe handling and manufacturer instructions. Ensure compliance with all applicable federal, state, and local laws.