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WikiPedia: AI_AS50 http://accuracyinternational.com http://www.accuracyinternational.com/AW50.php http://www.ketmer.com/ai/defense/aw50/index.htm http://world.guns.ru/sniper/sn67-e.htm https://web.archive.org/web/20060116021600/http://... https://web.archive.org/web/20091201152844/http://... https://web.archive.org/web/20100724141046/http://...