This will scratch and damage your BMPCC 4K. There are "lugs" on the bottom bracket that *should* fit into the standard 4K grooves, but they don't fit, they are incorrectly narrower, which is what happens when mounting the camera into the metal on the 4K bottom bracket bites. This cage also scratches the front of the camera below the left microphone. It also comes with only one screw. So if you ignore the damage it does when you install it, you can't even finish it the way it is. I decided I would support a small business by trying a cage off the beaten track and regretting it.