Eric, a friend of Gun Lab, let me borrow his AR-10 hand guards collection to photograph and measure up.
The first set of pictures is of a very early hand guard that has not been completed. The information I obtain from this single piece is worth volumes in trying to determine how and what material they were made from. This hand guard has none of the hole drilled into it and has neither of the end caps installed.
Looking at the front end of the hand guard you can see the thickness of the sheet metal liner and the density of the foam and fiberglass outer housing.
The front end cap, front view.
The rear end cap has a great deal more detail to it.
The second hand guard that Eric sent is an unused Sudanese type. You can easily see the hole pattern on the hand guard.
I started on a set of molds to make new ones in the future. Unfortunately, the first set that I made did not work correctly. A second set has been designed and programed and when time allows will be made. Projects are based upon time and if parts are available for me to complete the project.
I have to give special thanks to Eric for letting me borrow these rare components.
Just one last look of all of the hand guards in a single picture.