if you havent already beaten adam the clown yet then you can use his small chainsaw to
kill him, you simply hide behind the movable stands in the gun shop and wait untill he
reloads, then you run like a !%$"£over the counter and hit him 3 times with your saw.

Just kill the convicts get the 50. cal on the back and go shoot the $#%!* out of him.

just dont go in any place that shows you a move before your acatly in then go in his shop
he sould not be there grab sniper and shot gun then walk yo the hard ware store walk out
go to the store and fight him by hideing behind the door easy