I've listed 25 different tarp shelter designs to help you get started. Each configuration has its pros and cons and there isn't really a perfect design for all occasions. You'll have to chose the right one depending on your situation or you could just try
LWRC ULTRA COMPACT STOCK ON SBR - --- --- --- Don't care what you say you will never will me over to a forearm pistol grip. had something with a forearm pistol grip one time it just got in the way and the frustrating thing was it was nonremovable.