BOSS has a complex supply chain, with parts sourced from around the world.
Here's a detailed break down...
All assembly in done in Minnesota and Oregon
All finishes (including tumbling) is done in Minnesota
Most CNC machines are made in Switzerland
All major metal has US sources and is cut in Virginia, including
v5 boards are assembled in Russia, from parts made in
Optics used to made in U.K but that plant closed and moved to Poland.
Some parts including GID rings are made in USA
Other parts including switch and boot are made in China