Wurmslayer
 

Was looking at things on the p99 wiki and the link for the Wurmslayer http://wiki.project1999.org/index.php/Wurmslayer and noticed it says Primary and Secondary. Im pretty sure the Wurmslayer was Primary only as I used one with my warrior on live at one point. Haven't seen any in yet so im not 100% sure. That was the drawback to it, as you could not equip it in your offhand.

Wurmslayer was a 1-handed weapon primary/secondary/ranged for a certain amout of time on live before it was nerfed to be main hand only. Eventually it will happen on this server sooner than later.

Thanks. that explains it.