Haley Strategic Partners D3CRM Micro Chest Rig, Chest Rig, Multicam Arid, Nylon D3CRM-1-1-MCA The Disruptive Environments Micro Chest Rig (D3CRM) was designed to be adaptive to any mission and every environment. Over the past 8-years, the Micro has earned operational experience with deployments to every branch of the U.S. military including broad usage with U.S./NATO special operations forces, federal, and local law enforcement agencies.