Double Naught Spy
Sus Venator
@ Constitutional Cowboy
You'd be interested in Metal Storm technology. Stacked bullet (end to end) technology with electric ignition. Can produce truely phenominal rates of fire. They're not exactly thriving as a company though, partly because adopting them as a military fire arm would mean the military would completely- and I mean completely - have to dump all their current ammunition for the new electrically fired stuff. Though it's never been broached, I also forsee issues in a battlefield EMP environment without hardening. Surprised I was able to get my stock out at a profit before it took a nosedive.
Don't forget that they are prohibitively expensive. Reloads are abysmally difficult. Soldiers can't reload cartridges/canisters themselves in the field.
Currently, Metalstorm is listed on the ASX as MST and has a stock value of less than 1/10 of one cent per share.
http://203.15.147.66/asx/research/companyInfo.do?by=asxCode&asxCode=MST