Hey are these kits any good ? I currently have a old smart parts all american barrel about 10 years old. no sratches on the inside but its still old single piece. saw this SMART PARTS FEAK JR KIT at local store fo rlike 105 comes with three differnt bore sizes looks pretty good. you guys think this would be a good investment fo rmy gun or will my old school barrel do jsut the same if not even better job then the freak junior.