I actually have two identical rangebags made of ballistic nylon. One is for the ARs, and one is for the pistols.
In the AR rangebag, I have my windmeter, rangefinder, compass, extra stripper clips, LULA, electronic ear protection, mags, staplegun and extra staples, a few semi-clean rags, Otis cleaning kit, extra bolt carrier assembly, broken shell extractor, iron sight adjustment tool, extra otis patches, takedown pin punch, Leatherman multitool, triggerlocks, and sniper data book. In addition to the rangebag, I usually take a spotting scope and a benchrest stand and sandbag with me.
In the pistol rangebag, I have electronic ear protection, mags, extra ammo, swiss army knife, Otis cleaning kit, a few semi-clean rags, shooting gloves, mag quickloader, clothespins for outdoor range, and triggerlocks.