I know form follows function, but I like a good looking rifle also. I thought the bottle just didn't look right on my Crown (or any other PCP bottle gun for that matter). I saw this on an Impact and got one through a guy in the UK who makes them. It was like $18 or $19 USD shipped. You just pull it over like an extremely tight sock. No need to even remove the bottle! I think it really finishes off my synthetic Crown. What do you think?