From BLS we have their Precision range of non-bio regular BBs. Designed for precision and consistency these BBs deliver everything an airsoft player could want. With the highest tolerance currently available, they are 5.95mm ± 0.01 with a seamless high grade polished finish, so whether you are running a stock or high precision custom RIF, you will always get consistent results. BLS use a high quality polymer for their precision BBs, They are not Biodegradable.
 
Specification
BB Weight: 0.32g
Tolerance: 5.95mm ±0.01
Packaging: 1KG Resealable Bag
There are approximately 3125 x 0.32g BBs in a 1kg bag.