Alan Minyard wrote in message . ..

You have no idea. The Mauser was an inferior weapon.

Sources for that statement, please.

These quotes are from an official JSF press release:

'Citing lower costs, greater lethality and improved supportability,
The Boeing Company has selected the Advanced 27mm Aircraft Cannon for
its next generation JSF combat aircraft.....The gun is also a
candidate for the Lockheed Martin version of the JSF...."It's the
lightest, most accurate and reliable gun based on our initial studies"
said Dennis Muilenburg, JSF weapon system director for Boeing. "Our
comparative assessment found the 27mm cannon to be more affordable,
more lethal and more supportable than any of its competitors".'

Inferior, yeah.

In contrast, the press release from GD just mentioned that they were
proposing the GAU-12/U instead because it was cheaper and the ammo was
already in US service (you mean, that hadn't been realised before?).

If indeed the 27mm had become too expensive in the meantime, there is
only one likely explanation: the Americans spent too much time futzing
about with it to 'Americanise' it instead of simply adopting it. It's
been a reliable and effective weapon in European service for about two
decades in the Tornado and Alpha Jet, is also in service in the Gripen
and is about to enter service in the Eurofighter Typhoon.

Tony Williams
Military gun and ammunition website: http://www.quarry.nildram.co.uk
Discussion forum at: http://forums.delphiforums.com/autogun/messages/