From Cal's Sporting Armorie's website:
"This unit has no predicted release date, due to manufacturing problems. Trijicon is trying to fix these problems before releasing this unit. The following information was provided to us by a Trijicon employee at the 2003 Shot Show in Orlando.
Trijicon wants the the fiber optic window on top of the unit to be white, but they can't find an adhesive that will bond the white window to the polymer housing of the TriPower. Currently the fiber optic window will only bond to the polymer housing, if the window is made into a smoke colored version. Adding the smoke colored pigment to the resin aids in the bonding process. ****(This is why you may have seen pictures of the TriPower with a white and smoke colored fiber optic window)
When using the battery power the TriPower light source back feeds into the fiber optics illuminating the fiber and the window on top of the unit. ****(thus the rubber cover was made to help prevent the glow from being seen at night)
While the TriPower is mounted on top of an M4 Carbine, while suspended upside down the weapon is dropped, upon impact the fiber optic window brakes. ****(this breakage problem must be fixed before Trijicon will release the TriPower) "
FYI -Sul2