How to add weapon to Mannequin rig in maya

Hi, I am beginner for Unreal, and planning to make some sword animations for Marketplace
I am using Unreal Mannequin.
one animation I want to do is the character jumps in the air, then throw sword to the ground, then pick it up.
another animation is passing sword from one hand to the other hand.
can someone tell me what the best way to achieve it, and it is good for the Marketplace.
thanks a lot