The Rifle... 

There is no "confusion theory".  Weitzmann after glimpsing the weapon identified it as a Mauser.  After the officials did their investigation, they correctly labeled it a Mannlicher.  Both descriptions of the weapon became public which led to the confusion over what the weapon actually was.  The paragraph as it is currently constructed explains it precisely, and is cited to the findings of the Warren Commission and newsreels photographs by Tom Alyea.

Publications with teams of fact-checkers, reporters, editors, lawyers, and managers, such as the Warren Report,  whether or not we agree with the finding, are usually regarded as reputable sources for the purposes of Wikipedia.