We're back with Professor Anvil for another master class in airsoft as he discusses if BB weights do affect accuracy. He uses the CYMA CM.009B/M16A1 AEG for this AATV lesson... "We test to see how much difference to accuracy changing BB weight makes in our CYMA CM.009B M16A1 Replica. We use ASG Open Blaster BBs of 0.20g, 0.25g, 0.28g and 0.32g at 10m."