Sig Sauer BB guns, new and improved range of Official Sig Sauer airsoft guns (pistols) these fire the standard airsoft 6mm plastic BB of 0.12g, 0.20g and 0.25g weights. You do not need to be a registered airsoft skirmisher to purchase from our range of airsoft guns but you must aged 18 or over. All of our airsoft guns comply with the VCR act 2007 and therefore will be transparent or brightly coloured in order to distinguish them from realistic imitation firearms.