In Terminator 2: Judgment Day, the T800 Terminator fired a 40x46mm grenade into the T2000 Terminator with an M79 grenade launcher. This didn't actually destroy the T2000 - falling into the molten steel after the damage sustained from the 40mm grenade is what destroyed the T2000 (then the T800 went into the molten steel voluntarily in order to be terminated).

No, it is simple. A grenade launcher fires grenades, but a missile launcher fires missiles.

yes, AGL stands for advanced grenade launcher

Since there is no one grenade laucher, there is no one cost. Rifle grenade launchers used in WW II were only a few dollars.

Current launchers such as the M79 and M203 would be $250 to $950 USD. However, to be owned by a civilian, they must be registered with the Federal govt, and a $200 tax paid on each one- and on each grenade.

There is also an airsoft grenade launcher and they are different prices also.

The standard fragmented grenade costs about 27.38 in 2007