I know the MK2 uses the interchangable liner system. I hear there are changes in the valve and porting and there is supposed to be a different regulator. These last things I can not verify. I have vIsually verified the barrel system.
Thanks for your help, I am currently using a Wildcat MK1. and would like to purchase an MK2 main block and barrel to upgrade it to an MK2. and 3D print a cheek piece. So I'm trying to determine the length of the cheek piece as the MK2 looks different to the MK1 and I think also just the front half of the main block sticks out a piece. The distances I want to measure I have marked on the pictures. Thanks again for your help here. A million thanks.