Interesting concept but mmmmmmm somewhat FLAWED in the application by a couple of decades or so.
"M79?" "Government Gunboats?" Are you still stuck in the last Rambo movie?
Drones, dude! If you want to be final about it, armed drones. A kinetic citation in final form with no appeal as our own Travis McGee's character's might use.
Ok... fine... Sharks with laserbeams it is. Bwahahah!