BLS is the trade name of Lien Sheng Plastic Industry in Taiwan, founded in 1991 grinding jewellery and switched to BB production in 1996. The factory runs a fully automated line, injection, precision grinding, polishing and packing, and turns out hundreds of tons a year across roughly thirty product lines from 0.12g to 0.50g, bio versions included. BLS also works as an OEM for well known airsoft labels, which is why its own bagged pellets often cost noticeably less than the branded equivalent.
The choice of players who buy bio ammunition by the kilo and care about grams, not graphics. Packaging is plain resealable bags, not field friendly bottles, and support is factory style: no US customer service desk, no marketing department to chase. In the States the pellets come through Amazon sellers and shops, so weight availability moves around.
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