The Brooklyn thug whose botched beauty-parlor robbery ended with a sharp-shooting off-duty cop blasting the gun out of his hand faces 40 years to life in prison after his indictment on attempted-murder charges, prosecutors said yesterday.

Winston Cox’s alleged robbery bid in October was foiled by Officer Feris Jones, who was getting her hair done at the Bed-Stuy salon. Cox ran from the scene dripping blood.

and cops followed the trail to his home in the Lafayette Gardens projects. Prosecutors said Cox had two accomplices in the raid: Nefrititi Earl and Steven McLeod.

McLeod allegedly supplied the gun Cox fired in the salon.