Heavy weight BBs (.36 and up) have Quality Control done in the USA by the BlueMag Airsoft Quality Control team. We have a blemish percentage of less than 0.1%.
 
The classic 6mm biodegradable BB. Injection molded and polished to perfection for consistent size and density. We choose to package all of our BBs in resealable 3000 ct. bottles, versus bags, to help cut down on accidental spills.