Luth-AR has added two new options to its lineup of complete AR-15 uppers: the A1 Slick Side Modern Retro Upper and the A1 C7 Modern Retro Upper.Both are designed to replicate the classic look of Vietnam-era rifles while incorporating modern materials and performance updates.Luth-AR @ TFB: Luth-AR Announces Complete Uppers With 1-8 1/2 Fractional Twist Barrels Luth-AR Launches A New Versatile .308 Fluted Bull Barrel Complete Upper It's GOOOOLD!New Luth-AR Titanium Nitride Coated (TiN) AR-15 BCG