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Biodegradable BBs

Many UK airsoft sites, especially woodland ones, now only allow biodegradable BBs. Bio BBs are made to break down over time rather than lingering in the soil, and they cost only a little more than standard BBs. We stock them from 0.20g to 0.45g from BLS, Valken and Xtreme Precision, including BLS biodegradable green tracer BBs in 0.20g, 0.25g and 0.28g.

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Frequently Asked Questions

Need To know more?

Why do some sites only allow bio BBs?

Biodegradable BBs are made to break down over time rather than lingering in the soil like standard plastic BBs. Many UK sites are set in woodland, so a growing number insist on them. Always check your site's rules before you play.

What weights of biodegradable BBs do you stock?

BLS bio BBs in 0.20g, 0.25g, 0.28g, 0.32g, 0.40g, 0.43g and 0.45g, plus Valken Accelerate 0.20g and Xtreme Precision 0.20g and 0.28g bio bottles.

Can I get biodegradable tracer BBs?

Yes. BLS biodegradable green tracer BBs come in 0.20g, 0.25g and 0.28g, so you can use a tracer unit at night games and still meet a bio-only rule.

Biodegradable Airsoft BBs

Biodegradable BBs (often shortened to bio BBs) are made to break down over time once they're left in the environment, rather than lingering in the soil like standard plastic BBs. Because so many UK airsoft sites are set in woodland, a growing number now insist on bio BBs, so it's always worth checking your site's rules before game day. Bio BBs usually cost a little more than standard BBs, but they let you play at bio-only sites and help keep the ground cleaner for everyone.

What's in the range

Most of this collection comes from BLS, with bio BBs in 0.20g, 0.25g, 0.28g, 0.32g, 0.40g, 0.43g and 0.45g weights. The 0.20g, 0.25g and 0.28g weights are also available as green biodegradable tracer BBs, so you can play night games and CQB with a tracer unit and still meet a bio-only rule. You'll also find Valken Accelerate 0.20g biodegradable BBs and Xtreme Precision biodegradable BBs in 0.20g and 0.28g bottles.

Choosing the right weight

  • 0.20g: a common starting point for stock pistols, spring guns and entry-level AEGs.
  • 0.25g and 0.28g: popular all-round weights for many AEGs and gas rifles, offering a good balance of range and stability.
  • 0.32g: a mid-weight option for upgraded AEGs and gas blowback rifles.
  • 0.40g to 0.45g: heavy BBs mainly used in upgraded sniper rifles, where the extra mass helps the BB hold its line over distance.

The best weight depends on your gun's power and hop-up, so it's worth testing a couple of options before a big game. Remember that a heavier BB needs more hop to fly flat, and that site power limits still apply whichever BB you use.

Tips for using bio BBs

  • Store your BBs somewhere cool and dry, in their original packaging, so they stay in good condition until you use them.
  • Avoid mixing different brands and weights in the same magazine, as this can make your shots less consistent.
  • Keep your inner barrel and hop rubber clean, as any build-up will affect accuracy whatever BB you're using.
  • Re-adjust your hop-up whenever you change brand or weight.

Tracer BBs for night games

Glow-in-the-dark tracer BBs light up when they pass through a tracer unit, letting you see where your shots are landing in low light. Pairing biodegradable tracers with one of our tracer units is a great way to enjoy night games at woodland sites that require bio BBs.

Explore our full range of airsoft BBs, see everything from BLS, or browse our heavy weight BBs for sniper rifles.
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