400 Legend is a modern, straight-walled cartridge developed by Winchester to provide enhanced stopping power and terminal performance on AR-style platforms. Developed to bridge the gap between the 350 Legend rounds and 450 Bushmaster cartridges, it utilizes a heavier bullet for improved energy retention and penetration. Its balanced design offers increased power without compromising on recoil control, making it a versatile choice. Explore our selection of uppers and rifles optimized for the 400 Legend to experience its performance firsthand.