Why can't I equip this weapon?

If you have the correct armor for the weapon but still cannot use it, usually one of these is true:

1. You have not unlocked the weapon in your skill menu (P then Skills).
2. The weapon is seasonal and locked behind challenges (for example Maul, Pike, Chain Dart & Scimitar).

For attributes, hover the stats to see what each one gives. Every weapon focuses on a primary damage type (Slashing, Piercing or Blunt), so adjust your stats to match. The weapon guides have the full breakdown.