I may turn this into a more elaborate article for a paintball magazine, but couldn't wait to get this out to SOG members.
Sights are a big problem for paintball guns.
The Sight rail almost does this, but judging the angle for verticle adjustments, or slight horizontal alignment keep it from being good enough for 1 or 2 shot sniping. Now the solution. Use tightly wrapped electrical tape to secure it to a sight rail. Spray paint the outside AND inside flat black. Sighting down a tube automatically makes sure that you are not off to one side, or pointing slightly up.