• 5.56mm/.223 Lower Receivers

  • Enhanced Charging Handle

  • Cylindrical Free Float Hand Guard

  • JDMB556-C Muzzle Break

Welcome from the JD Machine Tech family. We have been in business since 1996 manufacturing for the military, defense contractors, firearms, engineering firms and various other industries.

News & Events

  • We have moved! Come visit our brand new store and see our newest products!

    4170 Morena Blvd.
    Suite C
    San Diego, CA 92117

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