The Oblivinator
Location: Jay's Basic Firearms Shop - East Main street
Price: 3,890 500 Fame
Sellback: 973 125 Fame
Description: If the size of this beast doesn't scare your enemies away, the giant yellow blast beam certainly will! Send them to OBLIVION!
Note: Also obtainable during Character Creation.
Thanks to Ashluv, E, godofdeath999, Zero IX and 1023404.