Davidson Defense Left-Handed Ronin Competition 10.5-inch Carbine-Gas 1:8 5.56 NATO AR-15 Freefloat M-Lok Handguard Pistol Complete Upper Build

Left-Handed Ronin Competition 10.5-Inch Carbine-Gas 1-8 5.56 NATO AR-15 Freefloat M-LOK Handguard Pistol Complete Upper

This is a complete left-handed AR-15 upper chambered in 5.56 NATO, built around a Sandel 10.5-inch government profile cryogenically treated steel barrel with a phosphate finish, a 1-8 twist rate, and a carbine-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 carbine-length stainless steel gas tube and micro low-profile steel gas block at .750 complete the gas system, and the ACE-20 Series 10-inch freefloat M-LOK handguard covers the 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, Sandel 10.5-inch government profile cryogenically treated steel barrel, phosphate finish
• 1-8 twist rate, 1-2x28 thread pitch
• Carbine-length gas system with carbine-length stainless steel gas tube
• Micro low-profile steel gas block, .750
• Black Diamond Series left-handed slick side billet aluminum upper receiver, black anodized, no forward assist, no dust cover
• ACE-20 Series 10-inch freefloat M-LOK handguard
• Davidson Defense premium left-handed M16 nitride bolt carrier group
• 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 10.5-inch carbine-gas upper to an AR-15 lower they already own
• Left-handed builders who want a Davidson Defense left-handed M16 nitride BCG and charging handle included with a Sandel cryogenically treated barrel and ACE-20 Series M-LOK handguard in one complete 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 dust cover from the receiver body. The Sandel 10.5-inch government profile cryogenically treated steel barrel brings a phosphate finish and a 1-8 twist rate to the 5.56 NATO chamber, threaded at 1-2x28. The cryogenic treatment is applied to the barrel steel as a process that addresses stress and grain structure within the metal. The carbine-length stainless steel gas tube and micro low-profile steel gas block at .750 run a carbine-length gas system along the 10.5-inch barrel. The ACE-20 Series 10-inch freefloat M-LOK handguard surrounds the barrel and gas system along the forend with M-LOK slots along the handguard body for accessory attachment across the full 10-inch length.

Bolt Carrier Group and Charging Handle

The Davidson Defense premium left-handed M16 nitride bolt carrier group 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.