SA CORE™ 0.25g Airsoft BIO Pellets, 4000 BBs (Bag) – White

Specna Arms CORE™ BIO airsoft BBs

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The BIO CORE™ series consists of environmentally friendly BBs produced by Specna Arms with the aim of delivering high-quality, high-performance ammunition while maintaining a reasonable price, so you don't have to hold back when shooting. The ammunition undergoes very thorough quality control to ensure that every BB delivers the best possible performance on its way to the target. BIO CORE™ BBs are ideal for machine guns, submachine guns, assault rifles and precision DMRs with tight-bore barrels. Thanks to their precise dimensional tolerance of 5.95 ± 0.005 mm, they maintain stable contact with the hop-up bucking, both in R-HOP and FLAT hop systems as well as when using conventional buckings with a smaller contact patch. Strict weight consistency of ± 0.01 g ensures excellent grouping and minimal deviations. If you don't want to invest in the most expensive EDGE ULTRA™ series but still want reliable ammunition for tight-bore barrels without the risk of jams at higher rates of fire, BIO CORE™ BBs are exactly what you're looking for. The BIO version is made from a special PLA-based polymer (Polylactic Acid), which decomposes in nature many times faster; some fields and arenas only allow the use of BIO BBs.

Key features of CORE™ BIO BBs

Price / quality

High-quality BBs at a reasonable price, suitable for precision barrels in sniper rifles as well as machine guns with a high rate of fire.

Excellent accuracy

The diameter of 5.95 mm (± 0.005 mm) and weight consistency of ± 0.01 g make them suitable even for 6.01 mm precision barrels.

Ammunition for machine guns and precise DMR shots

The CORE™ series is versatile ammunition for assault rifles, precision DMRs and sniper rifles, as well as machine guns where you don't want to worry about the price of BBs and simply want to enjoy sustained fire.

Versatile use

Suitable for AEG, HPA, GBB, CO2 and sniper rifles with very tight-bore barrels.

BIO PLA version

The BIO version is based on PLA (Polylactic Acid), so it decomposes in nature many times faster.

Specna Arms CORE™ BIO BBs

High-quality BIO PLA ammunition with a controlled diameter of 5.95 mm (± 0.005 mm) for excellent accuracy while maintaining a low price.

Specna Arms BB product lines

• EDGE ULTRA™: The highest-grade series for maximum accuracy and performance. Unrivalled range and grouping thanks to dimensions of 5.95 mm (± 0.001 mm) and weight consistency (± 0.01 g) of individual BBs.
• EDGE™: Excellent quality for use even in extra tight-bore barrels. Excellent accuracy thanks to dimensions of 5.95 mm (± 0.005 mm) and weight consistency (± 0.01 g).
• CORE™: An affordable option with good parameters for regular gameplay. They feature precise dimensions of 5.95 mm (± 0.005 mm) and weight consistency (± 0.01 g).
• FLEX™: Ideal for all types of guns. They may have a wider tolerance of 5.95 mm (± 0.01 mm), but they are also more affordable than the extra-precise EDGE ULTRA™ BBs.

Technical specifications

• Series: BIO CORE™
• Weight: 0.25 g
• Quantity: 4000 BBs (1 kg)
• Diameter: 5.95 mm ± 0.005 mm
• Material: Biodegradable PLA material
• Colour: White
• Packaging: Resealable bag

Package contents

• Specna Arms CORE™ BIO BBs 0.25 g (4000 BBs)

Frequently asked questions from our store

What are the advantages of BIO BBs and are they worth buying?

The main advantage of BIO BBs is that they are more environmentally friendly. They are made from biodegradable materials (most commonly PLA-based plastic made from corn starch), so they gradually decompose in nature through the effects of moisture, UV radiation and bacteria, without leaving conventional plastic waste behind. In addition, the use of BIO ammunition is already mandatory at many outdoor fields and events.

Are Specna Arms CORE™ BBs suitable for a 6.01 mm precision barrel?

Yes. CORE™ BBs have a declared diameter of 5.95 ± 0.005 mm, making them suitable for precision barrels with a diameter of 6.01 mm and larger. However, if you're building a highly accurate DMR or sniper rifle and want minimal dimensional deviations in your ammunition regardless of price, we recommend trying the EDGE ULTRA™ series.

What is the difference between Specna Arms CORE™, FLEX™, EDGE™ and EDGE ULTRA™?

The main differences are manufacturing tolerances and price. The entry-level FLEX™ series offers affordable ammunition for regular gameplay and high consumption. CORE™ provides a versatile option with tighter manufacturing tolerances, EDGE™ adds a higher-quality surface finish compared with CORE™, while EDGE ULTRA™ is the most precise series for players who want to get the most out of their gun. CORE™ therefore makes very good sense for a standard AEG.

How should airsoft BBs be stored?

Keep BBs clean, dry and in sealed packaging, ideally in their original resealable bag. Do not pour them loose into pockets or dirty containers. Dust, sand and other debris can enter the magazine, hop-up unit and barrel together with the BB, where they can cause feeding problems, barrel fouling and reduced accuracy.