Is my cat a Maine Coon?

[simbwatou]

Hi, I got my cat as a kitten about 2 years ago, I never got to see his parents any the lady selling the kittens didnt know what she had but Hes awfully big for only 2 years and Iam starting to wonder if hes a maine coon or perhaps a mix. Hes more than double the size of my 10 yr old tabby and seems to have many physical traits of a Main Coon heres a few pics of him, thoughts??(he has black "tips" of hair that stick out above the tip of his ear and has thick tufts of fur in between his claws and a extremely bushy tail with the hair about 6 inches long and a solid tan/white colored belly weighs about 22lbs)