Originally Posted by
S.A.M.
from wikipedia:
"A Gunblade is a sword with a pistol or revolver embedded in the blade. The layout of such a weapon differs from a rifle with a bayonet in that the edged component has an integral barrel, rather than being attached to the end of the barrel. In essence, the gunblade has a pistol to supplement a sword, while bayonet is a blade to supplement a rifle. The gunblade does not fire projectiles, despite its name. Triggering a round in the gun chamber sends a shockwave through the blade, increasing the damage potential to whatever the blade strikes at that moment (confirmed by the Final Fantasy VIII Ultimania, an official publication of Square-Enix). This enhanced strike requires perfect timing by the user, making this weapon difficult to master and use effectively."