Varat'k Snarap
Crafted by the Gree Varat'k and on the transport ship Rokak'k Baran, the Varat'k Snarap was not a blaster weapon, but rather manipulated gravity to fire raking force field blasts that could vaporize another starship.
Sources
"The Gree Enclave" – Star Wars Adventure Journal 8 (First mentioned)
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