string: stuff inside "" (quotes), like "M16" or hint "this is a string"
Well, sorta. Don't know the actual "scientific" explanation
Anywho, the full list of weapon & ammo names is incidentally available here on our site, try this link out:
http://www.ofpec.com/editors/browse.php?browsewhat=0&category=0_3(Editor's Depot > Tutorials > Weapon, Ammo and Object Lists) ;D You should try the Ed depot 'ere posting here, most often the answer you're looking for can be found there. Or in the command reference (of which both the unoffical & official can be found on our site).
G'luck!
Wolfrug out.