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    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!

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