This is a sole source procurement for the purchase of multiplexers, with the Government intending to negotiate only with K & L Microwave, Inc. The requirement includes one First Article Test unit and seventeen production units. While it is solicited as sole source, all responsible sources may submit a capability statement for the agency's consideration. Contractors must be registered in SAM and the Joint Certification Program (JCP) to access controlled attachments. All quotes and required information must be submitted via email by the specified closing time.