Originally published on http://www.core77.com/blog/technology/abriefhistoryofunusualobjectsdesignedtokillpeoplefromfarawaypart4thepgfaself-aimingrifle27236.asp?utmsource=feedburner&utmmedium=feed&utm_campaign=Feed%3A+core77%2Fblog+%28Core77.com%29 We all know the movie trope of the hired assassin up on a rooftop, calmly removing his sniper rifle from a foam-padded case and assembling it with practiced ease.