The Weathered Sledge Hammer is the basic sledgehammer.
This sledge has seen better days.
The Weathered Sledge Hammer can be obtained from Skye's Bar. You must first have some toilet paper, bought from Wally Mart and then give it to the guy in the men's bathroom of Skye's Bar. Then, he will give you the Weathered Sledge Hammer. It has moderate damage and moderate range and slow rate of fire.