World at War is my favorite modern war platoon-counter game series. I use it to study my profession (I am a U.S. Army cavalry officer). I use these modifications to give me the best feel for modern combat I think these type of rules can simulate. They can be used as a whole, or just in part.
I submitted these per request from the LnL FB page, since designers are considering updates to the current rule set. I humbly offer these for consideration...feel free to use or ignore as they strike you!