IA CO SAC CA stands for InterAmerican Company, Sacramento, California.
It was also known as InterAmerican Import Export Company.
InterAmerican imported firearms and parts kits from China, Korea, Singapore, Hong Kong, England, Germany, Israel, Australia, Brazil and some other countries.
Pacific International Merchandising Co (PIMCO), along with Armex Intl (a class 3 dealer) and Old Sacramento Armoury (a retail gun store) were the three different extensions that distributed the wares of InterAmerican at the local retail, wholesale and class 3 levels.