http://www.patreon.com/ForgottenWeapons https://www.floatplane.com/channel/ForgottenWeapons/home Cool Forgotten Weapons merch! http://shop.bbtv.com/collections/forgotten-weapons Aside from the German widespread issue of the ZF-41 type scope, I have only come across three other military uses of long eye relief optics - and they are all Norwegian! One is simply Norwegian reuse of surrendered German K98k-ZF41 scopes, including updating them to .30-06 in the 1950s (these were eventually replaced by the M59 pattern sniper). Second is a very interesting M1A1 carbine fitted with a ZF-41 scope by the Norwegian Resistance during World War Two, which is on display at the Imperial War Museum in London (https://www.iwm.org.uk/collections/item/object/30035937). Third is an experimental Norwegian G3 sniper made with a Leupold M8 scout scope in 1968. Both books referenced today are by Aslikd Antonsen, are written in Norwegian, and were donated to me by viewers. I don't have any good source where I can direct you to buy copies, unfortunately. Contact: Forgotten Weapons 6281 N. Oracle #36270 Tucson, AZ 85740