John Bush is a Master Armorer and renowned expert on U.S. and Foreign Military firearms. His vast knowledge is an incredible resource and he has taught AGI courses on Building AKS rifles from a parts kits, rebuilding the M1 Garand, along with Armorer Courses and a Gunsmithing Club of America favorite video segment “In the War Room”. He is one of the few people we know of who can have a box of miscellaneous firearm parts dumped in front of him and he can identify what the part is, what firearm it is from, and what country or factory made them!