For a revealing discussion of the gun, see http://allanfavish.com/index.php/vincent-foster/201-interview-with-james-b-stewart-april-30-1996
More on the FBI memo that conflicts with the Government’s conclusion: http://allanfavish.com/index.php/vincent-foster/139-fbi-memo-no-exit-wound
I am unaware of any major media organization attempting to ask the FBI about these documents.