Luth-AR A3 Stripped Upper Receiver — .223 Rem, 12-Position Rail

The Luth-AR A3 stripped upper receiver is a forged, flattop component engineered for AR-15 builders and technicians. Specified for .223 Remington, it features an M4-type feed ramp and a 12-position Picatinny rail to accommodate optics or flip-up sights. The receiver includes a shell deflector and forward assist housing and is prepared for an ejection port cover. Precision machined from 7075-T6 aluminum and finished with a hardcoat anodize for a durable, scratch-resistant surface.

Key Specifications

• Caliber compatibility is .223 Remington.
• Fit is AR-15.
• Style is a A3 flattop receiver.
• Feed ramp type is M4-type.
• Accessory mounting is a 12-position Picatinny rail.
• Included features are a shell deflector and forward assist housing.
• Prepared for ejection port cover installation.
• Material is a 7075-T6 aluminum forging.
• Exterior finish is hardcoat anodized.
• Color is black.

Whether you are assembling a custom AR-15 or replacing a factory component, the Luth-AR A3 upper provides a robust, precisely machined platform for your build. Its forged 7075-T6 construction and hardcoat anodized finish deliver long-term durability while the 12-position Picatinny rail offers flexible options for optics and sighting systems. Designed for straightforward fitment and reliable function, this upper is a practical choice for builders seeking a clean, stable foundation for their rifle project.