 The FX-05 is distributed among the Mexican Armed Forces, and the military industry is aiming to produce 30,000 per year.The development of the FX-05 began as a 16-month research in 2005 with CIADTIM as part of research efforts to replace the HK G3A3 rifles that were in service with the Mexican military.Originally the HK G36 was supposed to become the Mexican military's standard rifle as plans were already drawn to transfer technology and equipment to Mexico to initially build 30,000 rifles at a cost of €63,016,125 as part of Mexico's military modernization program.