Luth-AR UR-01-E3-S A1 Slick Side .223/5.56 Stripped Upper Receiver

The Luth-AR UR-01-E3-S is a stripped A1-style slick side upper receiver built for retro and traditional AR-15 platforms chambered in .223 Remington / 5.56 NATO. Forged from 7075-T6 aluminum and finished in black hardcoat anodized, it offers the clean early-pattern look without a forward assist or brass deflector, ideal for clone-correct retro builds.

Shipped as a stripped upper only, the UR-01-E3-S arrives without a barrel, barrel nut, bolt, bolt carrier, or charging handle, giving builders a foundation to configure their own A1-pattern rifle. The slick side profile delivers the authentic pre-A2 silhouette favored by traditionalists and retro enthusiasts who want to recapture the original look of the M16-pattern carbine.

With an overall length of 9.9 in, width of 6 in, height of 1.9 in, and a weight of approximately 8.24 oz, this forged aluminum upper mates to any standard AR-15 lower receiver and accepts standard .223 Rem / 5.56 NATO barrels and components. Pair it with your choice of barrel, handguard, and bolt carrier group to complete a retro A1 rifle build.