This is engraving our USA made lower receiver.
http://vid620.photobucket.com/albums/tt ... wewzwb.mp4
This device is also capable of material removal and we use it to cut sharp cornered text and logos, unlike traditional engraving that uses a circular cutting tool. It can easily cut to the ATF compliant marking depth.
![Image](http://i620.photobucket.com/albums/tt289/threedi/IMG_0449_zpsaf6e5480.jpg)