Arcaswiss quick change adapter

You will need M4x20 Bolt, and two M4 Nuts, one held capitve in the fixed part, and one nut must be glued on the Bolt, after its inserted in the sliding part (so the sliding part also opens up again, when loosening the bold

to see what i mean, please have a look at https://youtu.be/7TkybpSQULk?t=110