Luth-AR Upper Receiver Assembly | .223/5.56 A3 Flattop

This Luth-AR A3 flattop upper receiver assembly is a fully assembled upper compatible with .223/5.56. It includes an M4-type feed ramp, charging handle, 12-position Picatinny accessory rail, shell deflector, forward assist, and an ejection port cover. The receiver is precision machined from a 7075-T6 aluminum forging and finished with a hardcoat anodize for durability and corrosion resistance. The assembled configuration is intended for use in AR rifle builds and component upgrades.

Product Specifications

• Caliber compatibility is .223/5.56.
• The product is a fully assembled upper receiver including a charging handle.
• Receiver configuration is an A3 flattop style for optics mounting.
• The feed ramp type is a M4-type feed ramp for reliable cartridge alignment.
• The accessory mounting system is a 12-position Picatinny rail.
• Included features are a shell deflector, forward assist, and ejection port cover.
• The receiver is precision machined from 7075-T6 aluminum forging.
• The exterior finish is hardcoat anodized (black) for abrasion resistance.
• The fitment is specified for AR rifles.
• Product type is listed as an Upper.
• Subcategory designation is Upper Receivers.
• Accessory compatibility notes a 1913 rail for mounting optics and accessories.
• The assembly comes fully assembled with included components.
• Manufacturer is Luth-AR.
• UPC is 859819007805.

Designed for builders and shooters who prioritize durable materials and straightforward installation, this Luth-AR upper receiver provides a reliable foundation for an AR rifle. Its flattop rail and M4-style feed ramp make it appropriate for range training, competition-style setups, and precision target work where a robust, serviceable upper is required.