It's the basic system others have suggested. There was even a really creative guy on here who made graphics and ideas for different bullets. Eventually, given I don't remembers whose idea is was, he made a chocolate bullet and bullet box, among others. This is the same concept.

Trixcta's Muffin Cannon is the same concept.

I'll eat my words (especially since the trading tables came out after countless months of staff saying, "No, we aren't doing the tables. Ever." /sarcasm). The fact is, this idea has been rejected many times, whether you want to dress it up in different clothes, that's up to you. Just don't be all hurt when you don't have it two months from now.