The texture for the dispenser is a furnace.
When holding or having the dispenser in your inventory it just shows the back of the block(in 3D).
MC-7027
Dispenser Texture
Resolved
Duplicate
0
Oscar Hill
(Unassigned)
Unconfirmed
block, world
Snapshot 13w02a
Retrieved
Duplicate of MC-6738. Please check before posting in the future.