Your airsoft gun is only as good as the BBs you put in it, so make sure you fill it with premium. That's right, Elite Force .25g Bio BBs not only fly true to their target, they stay true to the environment thanks to their biodegradable material composition. .25g BBs are generally the optimal weight choice for high-powered Airsoft pistols and most CQB and mid-range AEGs. Make the smart choice; load your mags with Elite Force BIO BBs!