0.25g Maruzen 3000 BBs.
These high quality BBs are manufactured by Maruzen in Japan. Maruzen is one of the oldest companies to produce BBs for the airsoft market are considered one of the original, high quality, standardized production BBs. Produced with a very high polish, they are recommended for all upgraded AEGs, gas-guns, and upgraded spring sniper rifles. The exacting standards involved in production make these perfect for use in high tolerance tightbore barrels. The heavier weight also makes these more accurate at distances as compared to 0.20g BBs.