GoldenBall 0.20g ProSlick Series Professional Sport Airsoft 6mm JDM Spec Japanese Domestic Market Grade Performance BBs - BLACK/WHITE - 4000rd Bag Airsoft Competition Grade BBs that offer unparalled performance in the field compared to other brands. Roughly 40% improvement (on average) due to high quality precision BB spherical consistency and density in comparison to other manufacturers on the market. These Japanese Domestic Market (JDM) BBs are crafted to exact specification and are made with the Airsoft operator in mind. Ultra-elite seamless by design, Once you experience the power of Goldenball, you'll never want to use any other brand of BBs ever again! No one needs a barrel jam in the field. Goldenball BBs are engineeed at a diameter of 5.95 mm with a +/- 0.1mm variance. This means that it will work exceptionally well with tightbore inner barrels and other performance type barrels. Performance over barrel jams. Elite Competition Grade BBs prove to yield an average 3-7 FPS gain on a standard metal gearbox AEG. Simply increase the power of your Airsoft rifle by using the correct BBs. Trusted and proven by Airsoft Operators and Professionals alike! Goldenball Industries brings their high end BBs to U.S. consumers to provide you the extreme precision, increase in AEG power and quality that you deserve. Why run inferior BBs through your AEG when you can utilize the power of Goldenball!