Complex sentence: The Fabrique Nationale (which was, along with Colt, one of the two primary manufacturers of the Browning M1903) designed the "Ruby" as a simpler, less expensive, and more easily produced alternative.
Split into simpler sentences: The Fabrique Nationale was, along with Colt, one of the two primary manufacturers of the Browning M1903. It designed the Ruby to be a simpler, less expensive, and more easily produced alternative.