350 LEGEND UPPERS (AR15)

350 Legend AR15 Upper Assembly / 350 Legend Complete Upper Receiver for AR15

The 350 Legend (9x43mm) is a straight-walled cartridge introduced in 2019 by Winchester Repeating Arms primarily for deer hunting in states with specific ammunition restrictions. At 2300 fps, this is the highest muzzle velocity, production, straight-walled ammunition available.  Bullet weights of 125-280 grain give this round a 150-300 yard lethal range for white tail deer, hogs, and coyotes. The 350 Legend uses a standard 223/556 bolt carrier group but requires magazines designed for the 350 Legend round.

AR15Parts.com components are sourced from top US manufacturers including Aero Precision, Anderson Manufacturing, Shaw Barrels, Swan Machine, Wilson Arms, Wilson Combat, ZRO Delta, and others. Each upper assembly has options to select Rail, Muzzle Device, Bolt Carrier Group (BCG), Charging Handle, and Magazine. Additional parts are available individually on our website.



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