I'm not so sure of the longevity or quality of Marlin's Camp carbines. i do know they use a S&W pistol magazine. So, as a light-duty plinkier, you're not going to get hurt too badly.
Now then, Ruger's defunct Police Carbine, in either 9mm or .40, ought to last you nearly a lifetime. In 9mm, it's like shooting a 10/22. A real pussycat.