I am posing in GOG because I can not post in Bare Mettle forums due to a lack of "priviledges".

I found a way to clone 1h weapons.

Please let me know if you were able to reproduce it.

Backgound
In the Management menu @arena, select any character with enough rank points and a dual weapon skill.

Unequip all weapons.

Clone procedure
1.- Equip any other weapon in the R hand
2.- Equip the weapon you want to clone in the L hand. (must be different from the R weapon)
3.- Remove R hand weapon to the Armory.
Note; you will notice that the rank points will not lower and the L weapon will switch hands.
4.- Click the rank scroll bar (just click or change ranks)
Return to the original rank if you changed rank or if you just clicked, you should be able to see the duplicate weapon.
5.- Remove first the L hand weapon to the armory
6.- Remove the R hand weapon to the armory (New cloned weapon)

Done.

I heard in the forums that the merchant can also clone armor =P