I know of the current rounds for the tanks and howitzers, but to miniaturize it to rifle size...I still don't see it. In the early 90's I could put a tomahawk through your bedroom window at 150 miles away & I could be under water doing it. I'm sure technology has grown 10 fold since then. Hell, who am I kidding...those private R&D departments may have about anything sci-fi we would ponder by now.