I will post this again because there is little doubt in my mind...

I will post this again because there is little doubt in my mind that this is what the US want, have a look at the link provided on page 24 of 27 where it says projectile Velocity= 1200 m/s, the DSTO are talking about a 60mm round at 1600m/s or better?

http://www.dtic.mil/ndia/2007armaments/Fair.pdf

They also say in the link, Novel Kinetic energy projectile may provide precision fires at 2-3 times the range of conventional artillery munitions.

I'm not sure of the exact figures for the DSTO mach5/50 but they would be in a similar ballpark in myb opinion, ok perhaps with a smaller projectile? but geez, it doesn't need all that electricity or weight like these weapons shown here do?

Yes this is why the US are watching it and they don't want it in anyone elses hands!
Million-Rounds-Per-Minute Gun (“Metal Storm”). In the “Defeat Land, Sea, or Air

Targets with Projectiles” BA/BWA (stands for Be Ahead/Be Way Ahead) warfighting capability, we identified technologies such

as electromagnetic railgun, hypervelocity rods, and railgun projectiles. U.S. sources

have demonstrated railgun prototypes and railgun projectile component technology;

hypervelocity rod is in early stage concept development.

However, none of these technologies have the rate-of-fire capabilities of the Million-

Rounds-Per-Minute gun developed by Metal Storm, Ltd. This technology has no known

equivalent and can provide an electronically variable burst rate of fire, from

conventionally slow to rates in excess of one million rounds per minute—rates beyond

U.S. capabilities. We assess this technology and its applications to the railgun and

hypervelocity rods as being ahead of those associated with current U.S. capabilities.

Across numerous applications, the technology incorporated in the Million-Rounds-Per-

Minute Gun could accelerate and synergize U.S. science and technology initiatives in

the field of projectile weaponry. From an operational perspective in the JFAFC area, it

would provide an enhanced capability for special operations, and for destroying

adversary command stations and key power grid sources from either an airborne or

land platform. It could also prove valuable for ship defense, mine clearing, and other

defense applications. Conversely, were this technology to proliferate, it is not clear that

air, land, and sea-based counter-measures exist which could defeat this system.

The sole source of this foreign technology, the force multiplier effect of this technology,

and the lack of U.S. warfighter “pull” for the technology warrants its inclusion as a

“Watch List” item—and as a potential candidate for the Industrial Base Investment Fund.