Luth-AR UR-01-E3-SA A1 Upper Receiver | .223/5.56

The Luth-AR UR-01-E3-SA is an assembled slick-side A1 upper receiver machined from 7075-T6 aluminum forgings and finished with a black hardcoat anodize. This period-accurate A1-style upper includes the A1 rear sight housing and the ejection port cover assemblies pre-installed and omits the forward assist and shell deflector. All attachment points are finished to current mil‑spec dimensions so contemporary AR-15 components fit without modification.

Applications: ideal for period-correct/retro AR builds and for range or collector projects where A1 styling and authentic fit are desired.

Product Specifications

• The receiver is constructed from 7075-T6 aluminum forgings machined to final dimensions.
• The finish is a Black Hardcoat Anodize for corrosion resistance and wear protection.
• The item ships Assembled with the A1 rear sight and ejection port cover assemblies installed.
• The listed caliber/cartridge is .223 REM/5.56 NATO.
• The make/model is specified as AR-15.
• The receiver color is Black.
• This slick-side A1 upper eliminates the shell deflector and forward assist to match period-correct styling.
• The design does not have M4-type feed ramps found on most current-production flattop uppers.
• Charging handle components sold separately; charging handle is not included.
• All attachment points are finished to current mil-spec dimensions for compatibility.
• Current production AR-15 components will fit without modification.
• Includes the installed assemblies: A1 Rear Sight and Ejection Port Cover Assemblies.
• UPC: 812058032205

This Luth-AR UR-01-E3-SA A1 upper delivers authentic A1 styling with modern machining tolerances. Its forged 7075-T6 construction and hardcoat finish provide a durable platform for hobbyist builders and collectors pursuing historically accurate AR configurations. The assembled package saves installation steps while maintaining compatibility with standard AR-15 parts for straightforward integration into a build.