Biodegradable BB Bastards are made out of corn (PLA) and off this side of the Earth in 90 days.
Silica BBs are inert and bio-neutral (glass, basically).
More info in this thread : http://www.airsoftcanada.com/showthread.php?t=97609
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"Regardez autour de vous : le sang coule ?* flot et si gaiement même, on dirait du champagne!" - Fedor Dostoïevski
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