I read recently on ACOG's website that Sweden has a fire and forget disposable anti-tank weapon that uses a compact ACOG for sighting.  Does any one have any idea what is to hapen to the optic once the weapon is disposed of?

I always thought that "fire and forget" referred to the weapon's ability to stay on  target after being fired without the shooter's input though a cable that told it where to go.  

I hope they keep the optic and use it on another weapon

There's a big difference between "fire and forget" and "disposable".  Fire and forget, as stated before, means that once the weapon is fired, the projectile finds the target on its own.  Most modern guided missles are "fire and forget".  If you are talking about "disposable",  you are looking at something like the LAW rocket, where the user fires the weapon, then discards the tube.

I havnt heard about this particular unit, but i'd be willing to bet it, even if Trijicon is making the sighting system for it, it won't be an ACOG that you can unbolt from the unit and strap onto your rifle.  Chances are it will be a cheap (at least by Trijicon's standards) optic designed for one firing and to be junked.

The Stinger missile is fire and forget and disposable, but you keep the sighting unit.

Quoted: The Stinger missile is fire and forget and disposable, but you keep the sighting unit.

As is the Javelin, and the Dragon it replaced.

Quoted: I read recently on ACOG's website that Sweden has a fire and forget disposable anti-tank weapon that uses a compact ACOG for sighting.  Does any one have any idea what is to hapen to the optic once the weapon is disposed of?

You read correctly.  Saab Bofors Dynamics makes the NLAW anti-tank weapon that uses a compact ACOG sight.  It is a disposable unit but the ACOG can be removed.  I am sure that they are recycled after training, but in actual combat they probably get tossed with the tube.

Here's the link:  www.saab.se/dynamics/node5560.asp