Originally posted by eternalshiva
er.. If you watch carefully, just as Squall is about to strike the enemy, you press R1 and the Gun blade shoots. It's the same thing for all the Characters to get a boost in attacks. It's tricky though! ;p
It only works when you attack with Squall and Seifer. The trigger only does anything for Irvine during his limit, and does nothing for everyone else.

Unless maybe it's a bug in the US version? Certainly doesn't work in the PAL version