those look great to me!! that one standing square to the camera is a beefy guy!
i have taken my rangers between 12 and 14 weeks, but i do have some that are 18 and i haven't gotten around to doing yet. they are hens, and are HUGE. they need to go, they have the bowling ball syndrome going on.
i definitely think free ranging them may add a week or 2, due to the sheer calories they burn when they run up my 200 yard driveway to see me, for example. to me, it's worth the trade off... they get to live happier lives, it's less work for me (i have yet to find a spot where i can tractor birds on my land), and the extra weeks make for some tasty birds.
i'm anxious to see a pic of the little one... the legs on my rangers varied greatly.. i even had one that had bright green legs. as far as color variations... they are a virtual rainbow.. drastic difference in color.