I want to put a sight rail on my Paintball Marker. It is a Spyder Rodeo(a little old) which rail should i buy?

So i recently bought a used Spyder Rodeo Paintball marker, a 20" Smart Parts barrel, and an evolution3 Viewloader hopper. I want to get as much accuracy out of the marker as possible and find that at long ranges it's difficult to aim accurately without any real scope. I want to get a sight and sight rail that will fit the marker.