They made a special edition the PCC9 which I prefer ergonomically as even at full extent the arp9 stock was just uncomfortable when I tried it. If only it was stop on empty.
I have a PCC9, great bit of kit and more comfortable, especially for cheek weld as I use a short scope. I would definitely rock something like the one in the bottom pic though.
https://www.patrolbase.co.uk/g-and-g-armament-g-and-g-pcc9-assault-rifle-aeg?pv=9580