... very important, as malformed BB's could easily damage the barrel of the airsoft weapon ... or the hop up systeim. Airsoft 0.2G BB BallItem No.:4020GRSpecifications:0.20g, Roundness, High grade precision, 5 ... green color.Application:For use in higher end spring airsoft rifles, AEGs, gas airsoft pistols, or higherPacking:4000pcs/Bag 20 Bags ...