Does anyone have or know where to find a milspec ordnance print of an M4 bolt and/or carrier? The closest thing I've found is a solid works model of the BCG but I really need a measured drawing and I have no idea if the model is actually to spec or just an "artist's impression." If there are some sort of hoops one has to jump thru to get this, I'd sure appreciate it if someone could point me towards the first one.