While we never laid down any strict rules or 'meaning' to the badge, here are two quotes from Jason (whose original idea it was) during the design process:
Quote:
For me mate the idea behind this was Moreso for the Grunt`s,not the Pilots. As there are more grunt costumes than the other. So I`ve always seen this as a Combat Assault Award rather than a Pilot Wings.
Quote:
You are correct concerning the intention of this Badge. It IS indeed to simulate a Combat Drop Award for Marine Infantry/Combat Infantry Marine.
Unofficially, I think we liked the idea that it might be pewter wings awarded after first drop; silver after tenth.. or fiftieth.. something like that. (That's drops in the fictional universe of course, not RL.) There's nothing canon here, so it's all open to interpretation.