SHOP Pro2a Tactical's huge selection of high quality 350 Legend AR-15 NR Side Charging Complete Uppers. The 350 Legend caliber was introduced in 2019 and has become the favorite among many hunters. The fastest straight wall AR-15 cartridge, the 350 legend offers devastating penetration and greater effective range than many other 30 caliber rounds. Pro2a Tactical offers many different barrel lengths, many options to turn your upper into the exact configuration that you desire. Our 350 Legend NR Side Charging Uppers are backed by our Limited Lifetime Warranty and made with the highest quality components the industry offers.