my best suggestion for this gun instead of that cleaning kit i mentioned erlier would be a bore snake.
http://www.walmart.com/ip/Hoppe-Bore...Gauge/22177821 i use a bore snake for all my pump guns. its real simple to use and cleans very well.here is a video on how to use it.
http://youtube.com/watch?v=AwlFtWtmcgU