Dont forget the later Mk2 models had full length scope rails and auto opening taps(I have two)
I have most Mk's of the Airsporter and agree with most of the above, apart from I must be the only Airsporter nut that does not like the full length stock on the stutzen . variants. I do love the S models almost as much as the Mk1.
RB2 is the one if you really do want to hunt with one, but I would rather use a PCP or Pro sport to hunt. Sorry but its true. The truth is that the tap loader is not the best for assuring accuracy, but they are a joy to shoot.
PS. My Dads Mk1 was bought by him new, and was the first gun that I ever fired, and is also the gun that will never be sold.