first i got a 4 inch to 2 inch flush reducer.. since my barrel was 2 inches.. then i got a 4 inch to 3 inch regular reducer.. since my barrel was 2 inches.. this would give a half inch on each side of the barrel to hide the wires.. see below.

flush reducer with lights added..L.E.D.'s

back of flush reducer..

flush reducer installed in 4 inch to 3 inch regualr reducer.. with barrel showing.. this way you can cover the barrel with a 3 inch pipe hiding all the wires till you get to a box to house your batterys

gree lights on.. with its own switch

red lights on with its own switch

both lights on

me holding the soon to be gun.. with lights on

showing you how the 4 inch flsuh reducer, the 4 to 3 inch regular reducer the barrel and the barrel cover works to hide the wires.. (unglued of course.) also by doing this.. it givs you the thickness to install and eye hook in the reducer to hook a sling for tactical operations.. (notice the hook eye)
and that is how you add lights to the front of you barrel..
if you need help let me know...
what do you think of my lights?