AT3 Complete Upper Receiver Assemblies

Build Your Ultimate AR-15 with AT3 Complete Upper Receiver Assemblies

Built with quality components and manufacturing processes -  AT3 Complete Upper assemblies are Built for Accuracy and Reliability - Guaranteed.

For a truly awesome build, use AT3 Complete Upper Receiver Assemblies. When it comes to AR-15, don't settle for less. You can expect quality where it counts. Shop now!