Hello, I have just enlisted in the US Marine Corps Reserve and my first job as I was told is to drive trucks. Convoy. I was also told that I have the ability to modify my vehicle, that they would teach me to weld. So if I happen to get deployed into live action, I would like to armor up my vehicle as best as I can. One thing I'm concerned about is different methods of destruction whether it be a rocket propelled grenade, a missile or fragmentation from small arms or IED's. I had a question about plate spacing and if empty space between plates had any effect on the stopping capability of armor. Another topic I wanted to ask about was the use of shingle like armor, over lapping plates with angled edges to deflect small fragmentation away from the people inside the vehicle (me). Attached is a simple drawing of what I mean. The first two images of what appear to be two solid blocks are what I am using to depict plate spacing. Would it be better for a perpendicular projectile to hit two solid plates mounted directly to each other or two plates with spacing in between? The next image simply depicts the angles of the edges which I would think as a pre-thought would help deflect fragmentation. I don't know what kind of freedom I actually have with this vehicle modification but I would still like to know for my own knowledge. Thanks for any help.