Upgrade your rifle with this dependable 16″ 5.56 NATO complete upper receiver. Built for accuracy and smooth performance, it features a free-float 15″ M-Lok handguard for solid accessory mounting and improved barrel stability. The nitride BCG delivers reliable cycling and low-maintenance durability, while the full-length Picatinny rail gives you plenty of room for optics. Ready to pin onto any Mil-Spec lower, this upper is built in the U.S.A. and ready for work.
Includes: 16″ 5.56 NATO barrel (1:8 twist), 15″ M-Lok free-float handguard, nitride BCG, charging handle, clamp-on system with steel barrel nut and screws.
Reliable, modular, and ready to run.
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Every One Horse rifle and component is made in America with uncompromising standards. We use U.S.-sourced materials, U.S. manufacturing, and strict quality control at every step. No shortcuts, no imported surprises — just dependable parts built by people who take pride in American craftsmanship. When you run One Horse, you’re running gear you can trust every single day.