We sell the 6mm standard normal size airsoft BB in various weights and qualities and bulk order of BBs. .12g BBs are the lowest grade and quality of BBs suitable only for LPEG or cheaper inexpensive airsoft guns. Do not ever use .12g BBs for mid-high level airsoft guns! .20g BBs are the standard for airsoft play and shooting with a balance in speed FPS and accuracy. Snipers or long range players with powerful guns will want to use higher gram BBs like .25g or .30g BBs which offer even better accuracy but at a lower FPS.