Complete Upper - One Horse 5.56 16" from Cactus Ammo LLC near Surprise, Phoenix, AZ

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.