Forum:Interesting theory?

Is it just me, or am i crazy? it seems that while farming craw. once you find a rare weapon, they show up more. example: the atlas chimera, ive never found 1 of them untill i farmed craw, after about a week of farming him i found one, then, i found 3 of them on consecutive kills, same with guns like the surkov, redemption, and niddhog. anyone else find this, or what?