The "Weapon" was introduced as a variation of the weight forward lure "Erie Dearie" by Erie Dearie . They basicly took the wire out of the lure and replaced it with about 30 inches of mono and put the lead head of the lure on the end of that mono. The basice difference between a harness and the weapon is single hook on the weapon and the weight is supplied with the weapon in the package and ususally matches the blade color. It is designed to be cast and the harness with usually multiple hooks is better trolled although it can be cast.

However with that said, at this time you want to be considering the "Mayfly" rig which is single hook much smaller beads and blade and is most effective when cast and allowed to swing on a tight line.

I tie mine by a simple snell to about a size 4 hook followed by 5 small (2 MM.) brass or dark red glass beads and a size 3 hammered gold colorado blade. Leave about 24 inches of mono for the lead and in the end tie a loop but in the loop tie in a single small bead. The purpose of the bead is to hold a barrel sinker from sliding down the line when it is placed on the loop. Attach the loop to a good ball bearing swivile. On the single hook you will use only about an inch of night crawler. Just enough to cover the hook. Cast this out and close the bale when it hits the water. Let the rig fall on a tight line and even better if you are drifting let it arc or swing with the drift. Most of your fish will come on the fall and during the swing. The walleyes are eating the larva as they come from the bottom up and usually not off the bottom. Others may have different methods that work well for them but this has been the most effective for me.