Robert Fitzgerald 
Croatian Antimaterial Rifle RT-20 (Rucni Top 20mm / Hand Cannon 20mm) 20x110mm Hispano tested on Croatian military polygon in Slunj, fired by Branko Nikolic – a.k.a Brada, a.k.a. Grizzly
http://www.hr-oruzje.org/Branko.jpg
http://www.hr-oruzje.org/RT_20_reticle.jpg
http://hr.aalan.hr/Katalog/tabid/3637/articleType/ArticleView/articleId/11523/Anti-Material-Sniper-Rifle-Type-RT-20-cal20x110mm.aspx
http://world.guns.ru/sniper/large-caliber-sniper-rifles/hr/rt-20-e.html
