AR-15 Cutaway Bolt Carrier Group Remix

I do have permission of the original creator to reupload this with my additions and in a different file format. 

Once produced you can see whats going on in an AR-15 bolt during operation as I was not aware how the locking lug functioned prior to printing this cutaway. 

Small parts are require to be printed vertically such as the bolt assembly, firing pin and cam pin.

The piston ring must be cut in order to install onto the bolt assembly. 

Some sanding/finishing maybe required.