NUPROL RZR 0.25g Precision BIO BB


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  • Tolerance: 5.95mm +/- 0.01mm
  • Biodegradable BBs
  • 0.25g Weight - 2200 or 6000rnd options

If you are looking for biodegradable BBs for use in both CQB skirmishes and out in the glorious woods, NUPROL have just the thing! The RZR 0.25g Precision BIO BB has the same ultra-tight +/- 0.01mm tolerances as NUPROL's standard BBs but are constructed from a biodegradable polymer, meaning they will be allowed on even the strictest Airsoft sites and no need to worry about cleaning up after shooting!

Full description


These 0.25g Bio BBs are constructed from polymer and measure 5.95mm in diameter with a tolerance of +/- 0.01mm, making them a great choice for improved accuracy and smooth, consistent feeding compared to cheaper alternatives. You are what you eat, and the same is true for your Airsoft gun. To get the most out of features such as adjustable HOP-up units and tightbore inner barrels, high quality ammo is an absolute must!

These BBs are approximately 0.25g in weight, making them great for almost any Airsoft gun and both indoors and outdoor skirmishing environments. Being constructed from biodegradable polymer means they will degrade over time, so whether you are shooting in the garden or on a skirmish site you don't need to consider the environmental implications of a heavy trigger finger!

Being 5.95mm +/- 0.01mm makes them great for tightbore barrel setups, guaranteeing smooth feeding with every shot. 0.25g is the go-to weight for most Airsoft skirmishers and has the benefit of being the perfect balance of projectile speed and long range stability.


  • Part of NUPROL's RZR BB Range
  • Tight tolerances - Perfect for tightbore inner barrels
  • Biodegradable polymer construction - No need to worry about clean-up!
  • 0.25g BBs - Great for indoor and outdoor skirmishes
  • 6000rnd bulk bag or 2200rnd bottle available
  • 5.95mm +/- 0.01mm tolerance

Package Includes

  • NUPROL RZR 0.25g Precision BIO BB



Name Variant
x2200, x6000,
Colour Wheel Greyscale
Item Colour
Weight KG Icon
Weight (KG)
Approx. 1.517kg

BB Specific

Approx. 6000
BB Type
BB Weight (g)
BB Size (mm)
Approx. 5.95mm
BB Tolerance (mm)
+/- 0.01mm