The Javelin Biodegradable BBs which are sourced through Spartan Imports are now available at Airsoft Unlimited. These are .20 ones and cost US$16.99 per bag.. "Yes, Javelin's long awaited Bio's have now arrived.  A whooping 5,000 BBs per unit.  They come in a foil sealed bag, unlike traditional plastic, to help preserve them and prevent premature decay.  Exceptionally high quality."