Hopefully a simple question, if a sniper is laying in a prone position on a roof or in a building for any length of time would they lay on the bare ground or use a sheet to provide some basic comfort ?

Richard,

For good reference, watch "American Sniper." It's about U.S. Navy SEAL Chris Kyle.

Thanks Pete, I've got American Sniper in my DVD collection I'll have to pull it out and watch it.

Appreciate your help sir.