That's absurd. A manual should be kept with the item is is designed for. Suppose my car has a flat and I need to read the manual to learn how the jack works? Or my stereo receiver has a fit and I need to read the manual to figure out it works? Or I want to know precisely how to take down my new gun? Or who to call in case of a problem? In the case of the FN guns it tells you lubricants to avoid, BTW. I know I am a guy and not supposed to read the manual-but I do and find it useful :)
I admit guns are usually pretty straighforward, but in the case of guns the manual has all that safety boilerplate as well. Suppose, god forbid, you have some kind of accident? Couldn't you argue you hadn't read the manual because it was at your bank? Seems to me you agent is exposing himself to some liaibilty.
I'd take them back if I were you. You could make him copies of the front page. Why does he need the whole thing, or if has receipts, the manual at all? My insurance carrier doesn't. Or call the manufacturers and get him copies, they usually send it out free.
Anyway, to try to get back on track, as it happens my second PS90 didn't come with a manual :) and I called up FN USA and they are sending me one (with a catalog) free. Their number should be on their web site.