There are many current and future space-based optical systems that are leveraging large aperture or segmented aperture primary mirrors. The growth in the aperture size is driving demand for new approaches to produce large aperture, space-based optical components and/or mirror segments that are more affordable and with faster manufacturing lead times than traditional optical components while still meeting challenging mission requirements. Harris is executing a mirror development strategy called Advanced Mirror Construction (AMC) to meet this need. A key component of this strategy is the utilization of replication to produce precision lightweight mirror components. We will present the motivation and initial results for the replication of lightweight, ultra-stable mirrors and mirror segments as well as the other key elements of the AMC strategy.