Tried to take the nozzle off with the hot end still attached to the mount right? Been there...Done that.. even knew better. No way to fix it but you can just replace the barrel. http://www.makergear.com/products/v4-barrel See HERE for a method on how to remove the piece on the heater block. Thanks ...

My extruder jammed and I was being careless when I attempted to remove the nozzle. The top barrel part of the extruder sheared off as shown in the pictures below. Is there any hope to repair or fix this? If not, is the best replacement part to order here - http://www.makergear.com/products/m2-upgrad...