He wields a 12 gauge Double Barreled shotgun, "It's got a Walnut stock, Cobalt blue steel, and a hair trigger." He also has a Chainsaw which he can attach to his right hand. He's not bad with lever-action rifles.
He can help with repairs but he is a walking Wild Wasteland Enounter. If you don't have Wild Wasteland as a trait you will if you have him as a companion.