-reverse trigger. The trigger with the loading notches back 7cm (i-e. the mech behind the trigger) was "invented" by Marco Bonfanti of C4 on the Monoscocca guns, AFAIK, all the others came after and copied (Cayman, Pathos, Effesub et cetera et cetera all copied this type of design).
It's a good solution because it gives a longer band stretch and more "power" compared to other guns of equal overall length. But it requirers a longer loading pad, to avoid the loading become unergonomic and difficult.
A.B.Biller was the one that "inveted" reverse trigger (at least he is the one with the oldest application of such triggers), Bonfanti copied Biller, Pathos copied Biller, Pathos makes effesub guns, Omer and cressi copied Pathos :friday
I m a bit late, hope to participate in next section, nice work!!!