I understand that it was a cost implication with the grip lever being quite complex to make. It is in my opinion the best sort and easiest to operate with Anson push rods being capable of becoming quite stiff. The hacket snap seems to be found mainly on the lower end guns. There is also a push button type on some higher end Scott guns which I don't care for as it required pressure on the button while trying to lift the forend at the same time and both together makes it quite awkward. Working the grip lever lifts the forend away as it is pushed across. Lagopus.....