Silencer sock
I got a single barrel shotgun cover for mine and it is fine,I would reccomend that you get the double barrel though as you get a bit more room in it and it fits even better. Have a look at www.bushwear.co.uk I spoke to the guy as they do rimfire moderator covers but he said they were too big and suggested the barrel covers, obviously they need cutting down but it is worth doing. If I remember they were about £4 plus p and p.
Hope that helps
Ben
Brno 22 hornet - CZ 455 Thumbhole 16" 17 Hmr - Baikal Sxs 12 gauge - Air Arms s410