Rear Deploying Broadhead

A rear-deploying broadhead comprising a body attachable to an arrow shaft, said body comprising an outer housing, an inner spine, and at least two blades pivotally attached to said inner spine,

• wherein said inner spine has a first end with a plunger end, and a second end with a pointed end,
• wherein the outer housing comprises a first closed end that terminates proximal to a structure for attaching the body to an arrow shaft and a second end which is open, wherein said outer housing comprises two lateral sides with are substantially open adjacent the second end of the outer housing,
• wherein said outer housing further comprises a front side and a rear side which both terminate at the second end of the outer housing with a pointed end,
• wherein said inner spine is shorter than the outer housing and is substantially disposed in the center of said outer housing, with said plunger end seated snuggly but movably inside the outer housing adjacent the first end of said outer housing, wherein, in a nondeployed state, the second end of the inner spine extends slightly beyond the furthest extent of the second end of the outer housing, and
• wherein said broadhead further comprises an external coating of a heatshrink plastic having an impact value allowing said coating to retain until the broadhead impacts a target, at which point the blades deploy through the external coating.