I am wondering what kind of weapon you can give a Riekling. Obviously, you can give them anything you want, but what will they use? I don't want to make something that he's not going to equip.

They can use a spear.
Give them Daedric Arrows.

Wait... do they use daedric arrows as spears?

You:
Me:

It's not much, but:

"The riekling scout will equip a bow if it is placed in its inventory. The riekling hunter will do the same with a two-handed sword."

http://www.uesp.net/wiki/Dragonborn:Riekling

Edit: Highlight the post, don't know whats wrong wit the writing.

I think scouts can use a bow, and hunters can do two-handed...

I may be wrong.

Eh I killed all the reiklings.