Period-correct A1-pattern upper receiver assembled with rear sight and ejection port cover. Machined from 7075-T6 aluminum with classic slick-side design and early carry handle contours.
The Luth-AR UR-01-E3-SA is a faithful reproduction of the early-pattern A1 upper receiver, machined from premium 7075-T6 aluminum forgings to exacting specifications. This assembled version arrives ready to mount, with the A1 rear sight and ejection port cover door already installed.
Authentic Slick-Side Configuration
Quality Construction
This upper receiver is designed around the original A1 pattern and does not include M4-type feed ramps found on most modern AR-15 flattops. Current production AR-15 components will fit at standard attachment points. The charging handle components are sold separately, allowing you to select the style that matches your build vision.
Builders seeking an authentic early-pattern upper receiver for retro builds, competition shooters who appreciate classic designs, or anyone wanting to experience the original AR-15 platform as it was originally configured.