On a seperate thread on eye protection we have had a bit of a deviation with regard to an insurer having added a requirement to wear eye protection in safe areas due to a previous incident  (Someone dry fired a sniper into a friends face and shot the last B.B. into their eye)   I mentioned barrel blocking devices / barrel condoms from Paintball, only to have it pointed out to me that they already exist in airsoft!   The short(ish) version of the barrel blocking device (B