Take your pick of precision BBs or be more eco-friendly with the Platinum and Bio-BBs from King Arms... "Original King Arms Platinum series & biodegradable 6mm BB bullets are back! These Made in Taiwan BB bullets are developed for experienced players, with high precision size control (5.95mm +/- 0.01mm diameter), ideal for high power and high-speed airsoft rifles and pistols, ultimate choice for personal and business use.