This is a recompiled version of Kali Linux for the Raspberry Pi including IPTables.
I recently realised that the arm version of Kali linux, specifically for the Raspberry Pi, was lacking IPTables.
I decided to set about adding IPTables into the kernel and then providing an image that would include IPTables by default.
If you just wish to install the kernel, place the kernel.img from the /kernel/ directory on this git inside of your /boot/ partition.
If you want to use the whole image file simply download the latest version from this git and use DD to put it on your SD card.
eg.
dd if=/path/to/kali.img of=/path/to/sdcard
(This process can take a while)