Actually, that's pretty good idea, Cosmo, convert your LeMat to launch cut down cross bow bolts from the shotgun bore, fit a nice brass tube to the rear end of it, mated to to a rubber line, braced with leather and with brass fittings of course, to a belt carried compressed air tank, with all the appropriate dials, gauges, and polished brass. Install an additional pressure switch above the trigger to release an air blast to lauch the cross bow bolt, extra points if it can be made into a grappling hook and carry a line.