its easy enough to get a decent rating fixer to source the ammo at game start for you, given you can save a couple of k from chargen and carry it over in-game. you can jack it into a heavy weapon mount on a drone/vehicle or that smart firing platform and draw power from that, bypassing the need for the energy clips.
TBH though, its such a ridiculously big and brazen weapon that outside of a warzone, the retaliation is probably going to outweigh the benefit of using it