I will have to find the reference but I understand that was a design feature of the Garandicon to be able to cock it with the trigger guard. For books all I have are two from Duff so it may be in one of those. I dont think it was for "immediate action" in the case of a misfire under combat conditions. There is no way such an operation could be done in haste considering that the original design of the trigger guard included the milled hole to utilize a cleaning rod to initiate take down.