I have never seen a rolling-block Airsoft gun. You can certainly buy other more popular antique replicas such as the Colt SAA or certain lever action rifles in GBB form.
Antique replicas (replicating a firearm originally manufactured before 1898) are exempt from the importation restrictions that we face with modern firearm replicas as they're not defined as prohibited devices/items. An individual can import an Antique replica, provided you can prove to customs that it is indeed an antique replica.
Last edited by GZA; October 5th, 2009 at 15:00..