Davidson Defense Maestro 18-inch Mid-Gas 1:8 .223 Wylde AR-15 Freefloat M-Lok Handguard Rifle Complete Upper Build

Maestro 18-Inch Mid-Gas 1-8 .223 Wylde AR-15 Freefloat M-LOK Handguard Rifle Complete Upper

This is a complete AR-15 upper chambered in .223 Wylde, built around an 18-inch heavy profile 416R stainless steel barrel with a stainless steel finish and spiral fluting, a 1-8 twist rate, and a mid-length gas system. The Black Diamond Series slick side billet aluminum upper receiver made in the USA anchors the front end with a clean slick side exterior and a .223 and 5.56 ejection port door with rod and spring. The mid-length stainless steel gas tube and micro low-profile gas block at .750 complete the gas system, and the Avalon 15-inch freefloat M-LOK handguard with slant port cutouts covers the forend. A tanker style 3-port muzzle brake in black with a 0.3-inch bore diameter at 1-2x28 closes out the muzzle end. A complete USA-made AR-15 bolt carrier group compatible with .223 Remington, 5.56 NATO, .300 AAC Blackout, and .350 Legend, and a Mil-Spec M4 charging handle complete the upper component set.

Key Features

• .223 Wylde chambering, 18-inch heavy profile 416R stainless steel barrel, stainless steel finish, spiral fluted
• 1-8 twist rate, 1-2x28 thread pitch
• Mid-length gas system with mid-length stainless steel gas tube
• Micro low-profile gas block, .750
• Black Diamond Series slick side billet aluminum upper receiver, USA made, .223 and 5.56 ejection port door with rod and spring
• Avalon 15-inch freefloat M-LOK handguard, slant port cutouts
• Complete USA-made AR-15 bolt carrier group, .223 Remington, 5.56 NATO, .300 AAC Blackout, and .350 Legend compatible
• Mil-Spec AR-15 M4 charging handle
• Tanker style 3-port muzzle brake, black, 0.3-inch bore diameter, 1-2x28 thread pitch
• Black 1-2-inch crush washer

Perfect For

• AR-15 rifle builders pairing a complete .223 Wylde upper with an existing lower
• Shooters adding an 18-inch .223 Wylde upper to an AR-15 lower they already own
• Builders who want a USA-made BCG and charging handle included with a spiral fluted 416R stainless steel barrel and Avalon M-LOK handguard in one complete upper assembly

Upper Receiver and Barrel

The Black Diamond Series slick side billet aluminum upper receiver made in the USA anchors the front end with a clean slick side exterior profile that omits both the forward assist and the dust cover button from the receiver body, with a .223 and 5.56 ejection port door with rod and spring providing ejection port coverage. The 18-inch heavy profile 416R stainless steel barrel brings a stainless steel finish and a 1-8 twist rate to the .223 Wylde chamber, threaded at 1-2x28. The spiral fluting along the barrel body is a machined exterior feature of this specific barrel. The mid-length stainless steel gas tube and micro low-profile gas block at .750 run a mid-length gas system along the 18-inch barrel. The Avalon 15-inch freefloat M-LOK handguard surrounds the barrel and gas system along the forend with M-LOK slots and slant port cutouts along the handguard body for accessory attachment and weight reduction across the full 15-inch length.

Bolt Carrier Group and Charging Handle

The complete USA-made AR-15 bolt carrier group is compatible with .223 Remington, 5.56 NATO, .300 AAC Blackout, and .350 Legend chamberings, making it a versatile BCG well matched to the .223 Wylde platform. 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 tanker style 3-port muzzle brake in black with a 0.3-inch bore diameter 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.