I ran across .PDF copies of both these manuals in some old files of mine. I also have a .PDF of the US Army survival manual FM 21-76 circa 1992, The SEAL manual is an instructors manual which includes exercises to test skills and loadout requirements/pics. These are older manuals that should no longer be classified in any manner. Enjoy
I've uploaded them to here:
USMC Sniper- http://www.megaupload.com/?d=BFNYEGG8
US Navy SpecWar Sniper-http://www.megaupload.com/?d=7F1KLUSU
US Army Survival-http://www.megaupload.com/?d=LOSOHN70