The proliferation and diversion of privately made firearms and other non-industrial small arms and light weapons pose a growing threat to security across the world.  Some regions have attempted to regulate rather than prohibit manufacturing, but these efforts are hindered by implementation challenges and diversion. Additionally, new technological developments and the ease with which information and expertise can be shared online have decentralized production, contributing to the global diffusion of the tools and skills necessary to build small arms and light weapons.