Evolution Airsoft 0.25g Xtreme Precision 6mm Biodegradable BB x 2800

Evolution Airsoft
Code: BIO-25W-C-BOX
  • Approx. 2800 BBs
  • ±0.005mm Tolerance
  • Biodegradable 0.25g BB

If extreme precision is what you're after when building your Airsoft gun then why not get a BB which matches the quality of your rifle? The Xtreme Precision® BIO range of BBs have been developed by Evolution Airsoft in Italy to conform to some of the highest tolerances on the market, leading to an extremely stable, precision BB. Heavily tested during production these BBs have passed multiple certifications and tests to ensure you're getting your hand on the highest quality product you can get, with no room for error. 

These BBs are designed to be biodegradable, meaning that they will deteriorate over time when exposed to the natural environment and anywhere where microorganisms exist. These BBs are highly stable, and when stored are not affected by Humidity like other brands of Bio BBs.

These BBs are perfect for any Airsoft Skirmisher who is looking to get the absolute peak of performance out of their replica, whether it be an Electric AEG, HPA or a Gas Gun, even if the site only allows Bio BBs.

Full description



  • Xtreme Precision® quality
  • Part of the Pro BB range for professional use
  • Produced by Evolution Airsoft
  • 6mm Airsoft Plastic BBs for use in AEG, Gas and HPA Guns
  • Produced from a blend of biodegradable materials and Modified Corn Starch
  • Certified truly biodegradable
  • Not affected by humidity like other Bio BBs
  • Bag of approx. 2800 BBs
  • Resealable bag
  • One of the most popular BB ranges in France
  • Deliver peak performance in both standard and super tight-bore barrels
  • Consistent size due to high precision production methods
  • Guaranteed roundness thanks to high tolerances during manufacturing
  • 5.96mm in diameter, perfect for tight bore barrels
  • Precision ±0.005mm tolerance, one of the highest in the industry
  • 1.088µm average roundness
  • Maximum accuracy
  • Mirror like polished and finish
  • Packaged in an automated factory
  • Produced in Italy using a precision process
  • Final check and inspection carried out by humans
  • Tested using professional laser instruments
  • Certified EN71 pt.3:1994-12+A1/09.00+AC/07.02
  • Certified (EC) no 1907/2006, Regulation, Evaluation, Authorization and Restriction of Chemicals (REACH)
  • Compliant with ASTM D-6400-99 "Standard specification for compostable plastics"

Package Includes

  • 0.25g Xtreme Precision 6mm Biodegradable BB x 2800

Special Instructions

Bio BBs are typically used on sites which are nature protected, or where the land owners have imposed restrictions on what types of BBs can be used. If you need to know if you need to use Bio BBs or not then please contact your local games site.

We would recommend Bio BBs for backyard plinking so that they degrade over time in soil rather than remaining there indefinitely.

The Xtreme Precision® Biodegradable BB's are made from modified corn-starch combined with other biodegradable materials. This biodegradable material is stable in the atmosphere but biodegrades in the natural environment and anywhere where microorganisms exist. This type of biodegradable material, being based on corn-starch and other vegetable starch, is derived from a renewable resource. All Xtreme Precision® BBs are certified by the German test lab TÜV Rheinland to ensure compliance with all EU standards. 🌽



Colour Wheel Greyscale
Item Colour
Dark White
Product Height
Approx. 3.5cm
Product Length
Approx. 15cm
Product Width
Approx. 22cm
Weight KG Icon
Weight (KG)
Approx. 0.712kg

BB Specific

Approx. 2800
BB Type
BB Weight (g)
BB Size (mm)
Approx. 5.96mm
BB Tolerance (mm)
+/- 0.005mm
BB Material
Modified corn-starch, biodegradable material mix
Bag, Resealable,

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