Unlocked Silver Los a few weeks ago by killing 100 wyverns, first time to try and kill it today. Finished it with 1:49 left on the timer, and it was through a random trap and tranq even though it wasn't showing weakness 
White sharpness weapons bounce off its head
Gave me two los plates and a ruby though.
Ahhhh I hate it a lot. Was using GL so I shot its head with three or four wyvern fires and a ton of normal shots with gunnery king, and it didn't break x _ x

White sharpness weapons bounce off its head

Ahhhh I hate it a lot. Was using GL so I shot its head with three or four wyvern fires and a ton of normal shots with gunnery king, and it didn't break x _ x