BLS BIO Ultimate Heavy BBs 0.36 g — White

The BLS BIO Ultimate Heavy are airsoft BBs made from biodegradable PLA polymer, weighing 0.36 g, packaged in a resealable bag of 2,800 BBs with a total weight of 1 kg. They are designed for high-FPS airsoft guns or builds with a hop-up tuned for heavier BBs, where the additional mass helps stabilise the flight path.

The diameter of 5.95 mm ± 0.01 mm is the critical specification in this category: such a tight tolerance ensures consistent contact with the hop-up bucking, reducing backspin variation and therefore trajectory deviation — particularly at longer ranges. A BB outside tolerance can cause unpredictable deviations even with a well-adjusted hop-up, making any optic zeroing pointless.

The biodegradable PLA polymer construction is what sets these BBs apart from conventional ABS alternatives. In the field, this means that any BBs not retrieved will break down over time, making them suitable for sites where the use of biodegradable material is required or preferred. The usual PLA trade-off applies: greater sensitivity to storage conditions compared to ABS, so keep them in a cool, dry place and use them within a reasonable time of purchase.

Key features

• Weight of 0.36 g suited to high-powered airsoft guns with a hop-up calibrated for heavy BBs, where the extra mass stabilises the trajectory compared to lighter BBs.
• Diameter tolerance ± 0.01 mm at 5.95 mm: consistent BBs reduce random deviations and make hop-up adjustment more precise and repeatable.
• Biodegradable PLA polymer: breaks down naturally in the environment, making these BBs suitable for fields and areas where non-biodegradable material is discouraged or prohibited.
• Pack of 2,800 BBs in a resealable bag: lets you measure out exactly what you need for a game without exposing the rest to dust or moisture.
• White colour: makes it easier to track the BB's trajectory visually during use, which is handy when fine-tuning the hop-up.

In the box

• Resealable bag containing 2,800 white BLS BIO Ultimate Heavy 0.36 g BBs