After a recent Blank firing exercise, approximatly 20% of the weapons used had the gas plug and cylinder siezed together. The weapons were correctly cleaned and oiled at every oppertunity, the correct rates of fire were observed and the BFA's were correctly fitted. The weapons fired approximatly 1500 rounds each by the time the failure occured. I was wondering if this is a common occurence and if so, has anyone submitted an EFR? This is of course the super L85A2 which can be burried in sand and fired for ever!