This is the third machining operation on the upper barrel section of the Bolt. We are adding the slot for the bolt-action mechanism as well as the tapped holes and flat for the clip. The video is shown in real time and all parts are loaded (and unloaded) into the machine one at a time, by hand. On the right of the frame is a 4th axis that allows the part to be rotated as it is being machined so that the curved slot can be cut all in one operation. The red air hoses are for opening and closing the pneumatic collet nose that holds each part as it is being machined. Neat huh?