I dont have pictures of the over the barrel flash hider but I know you can get them here
and here too
Some people use the 5.5" flash hider to add length to a barrel when not shooting with a can but I dont think many use the one that
is over the barrel.
4.5" barrel under the hand guard without the can on
and with the 5.5" flash hider to bring the muzzle out from under the hand guard when shooting unsuppressed