"Thomas Schoene" wrote in message nk.net...

The M197 is a 20mm gun that was fitted in later AH-1s. The original Cobras
had a mix of 7.62mm miniguns and 40mm AGLs in the M28A1 chin turret.

The 7.62mm minigun was the M134, usually mounted with an M129 grenade
launcher, though some aircraft had two miniguns instead (and maybe some had
two AGLs?).

The early turret only had one M134, but most could mount two weapons.
The M134 and 40mm AGL were interchangeable, but one of each was the
norm.

The FAS detailed page on the M134 is he
http://www.fas.org/man/dod-101/sys/ac/equip/m134.htm

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