BBs are your "ammunition" in airsoft - and it's confusing. So many weights, brands, etc. Our advice is simple: If you know what you're after, use the product finder below to find exactly what you're after. If you're not sure - then 0.2g BBs are generally always a safe bet. Many sites use 0.2g as a chronograph weight to check the speed of the BB as it exits your barrel. Many manufacturers now supply BBs in 3300 count bottles which are convenient, however, they will rattle as they empty, possibly giving away your position. To help solve this, some manufacturers supply BBs in bags, which you can then roll up the empty bit of bag so the BBs can't move and therefore won't make anywhere near as much noise as a bottle.