Luth Ar A3 Upper Receiver

The Luth-AR A3 Upper Receiver is a precision-machined stripped upper assembly engineered for .223 Remington builds. Manufactured from 7075-T6 aluminum forging and finished with hardcoat anodize, this A3 flattop platform delivers the durable foundation serious builders and gunsmiths require for reliable, accurate rifle systems. The stripped configuration allows complete customization of bolt carrier group, charging handle, and gas system—ideal for operators building specialized configurations.

The A3 flattop design provides maximum flexibility for optic mounting via the integral 12-position Picatinny accessory rail, supporting everything from magnified rifle scopes to co-witnessed iron sight systems. The M4-type feed ramp ensures reliable cartridge feeding across quality ammunition loads. Shell deflector and forward assist housing are integrated; the ejection port is ready for an optional cover. The 7075-T6 aluminum alloy—the same material specification used in aerospace and military applications—combines weight savings with tensile strength. Hardcoat anodizing provides scratch-resistant protection against field wear, salt spray, and corrosive environments.

This upper receiver suits custom builders, gunsmiths, law enforcement armorers, and military personnel constructing duty rifles, training platforms, or precision builds. The A3 upper is standard across military and civilian markets, ensuring parts compatibility and aftermarket support. Buyers should verify bolt carrier group and charging handle specifications separately, as this is a stripped assembly. Available now at TacticalSurplusUSA with detailed Luth-AR A3 Upper Receiver specifications and immediate shipping options.