Schematic: Flintlocke's Woodchucker

Schematic: Flintlocke's Woodchucker is a recipe used in Engineering (a schematic). It is used to learn how to create Flintlocke's Woodchucker, a type of scope. Although the scope is restricted to Hunters, the schematic itself is not.

Source
This schematic is sold by at the Molten Front (Firelands) which can be accessed through a portal in Mount Hyjal. To be able to see Bloombeard you'll have to complete the quests Quest:Druids of the Talon and Quest:The Shadow Wardens which each require 125x Mark of the World Tree, and furthermore Quest:Additional Armaments - which also require 125 marks - to unlock Bloombeard's wares. The schematic itself is sold for.