Oversight 16.5-inch Mid-Gas 1:7 .223 Wylde AR-15 M-Lok Rifle Complete Upper Build

Oversight 16.5-Inch Mid-Gas 1-7 .223 Wylde AR-15 M-LOK Rifle Complete Upper

This is a complete AR-15 upper chambered in .223 Wylde, built around a 16.5-inch standard profile 4150 steel barrel with a nitride finish and a 1-7 twist rate. The 7075-T6 aluminum upper receiver with an anodized finish and M4 feed ramps anchors the front end, with a standard forward assist assembly and an AR-15 ejection port door assembly built in. The mid-length gas system pairs well with the 16.5-inch barrel, running a stainless steel gas tube and micro low-profile steel gas block at .750 inch along the barrel into the 15-inch freefloat M-LOK handguard that covers the forend with a full-length top Picatinny rail and integrated QD mounts. A complete AR-15 bolt carrier group made in the USA and an M4 Mil-Spec charging handle complete the upper component set.

Key Features

• .223 Wylde chambering, 16.5-inch standard profile 4150 steel barrel, nitride finish
• 1-7 twist rate, 1-2x28 thread pitch
• Mid-length gas system with mid-length stainless steel gas tube
• Micro low-profile steel gas block, .750 inch
• 7075-T6 aluminum upper receiver, anodized, M4 feed ramps
• AR-15 ejection port door assembly
• Standard AR-15 forward assist assembly
• 15-inch freefloat M-LOK handguard, full-length top Picatinny rail, integrated QD mounts, no anti-rotation tabs
• Complete AR-15 bolt carrier group, made in the USA, 5.56, .223, .300, .350 compatible
• AR-15 M4 Mil-Spec charging handle
• A2 GI Birdcage flash hider, 1-2x28 thread pitch
• Black 1-2-inch crush washer

Perfect For

• AR-15 builders pairing a complete .223 Wylde upper with an existing lower
• Shooters adding a 16.5-inch mid-gas upper to an AR-15 lower they already own
• Builders who want a BCG and charging handle included with the upper assembly

Upper Receiver and Barrel

The 7075-T6 aluminum upper receiver with an anodized finish and M4 feed ramps forms a solid foundation for this front end, with a standard forward assist assembly and an AR-15 ejection port door assembly as part of the receiver. The 16.5-inch standard profile 4150 steel barrel brings a nitride finish and 1-7 twist to the .223 Wylde chamber, threaded at 1-2x28. The mid-length gas system is a strong pairing for this barrel length, running a mid-length stainless steel gas tube and micro low-profile steel gas block at .750 inch to keep the gas timing well-suited to the 16.5-inch profile. The result is a front end that balances barrel length and gas system length in a way that gives this upper a well-matched component relationship from chamber to gas block.

Freefloat M-LOK Handguard and Bolt Carrier Group

The 15-inch freefloat M-LOK handguard surrounds the barrel and gas system along the forend, running a full-length top Picatinny rail from the upper receiver to the muzzle end of the handguard and integrated QD mounts for sling attachment. The handguard does not include anti-rotation tabs, which is a design characteristic of this specific unit. The complete AR-15 bolt carrier group, made in the USA, covers 5.56, .223, .300, and .350, making it a versatile and well-suited choice for the .223 Wylde chamber. The M4 Mil-Spec charging handle pairs with the BCG inside the upper receiver to complete the upper interior and finish the front end of the build.

Muzzle Device

The A2 GI Birdcage flash hider threads onto the 1-2x28 muzzle end of the barrel and finishes the front of the upper with a standard proven flash hider pattern for the .223 Wylde chambering. 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.