This weapon is only available in class 2 fixed or turreted mounts. It’s included in our Weaponry guide for the sake of completion, but more detailed info will be contained in our Anti-Xeno section.
Unlocking the Remote Release Flak Launcher
Simply find a station that stocks the item, remembering to buy from Li Yong-Rui owned stations. A reasonable choice is Nelder Hub in HIP 21474.