Lets get one thing crystal clear; I did not fail this because it was from Halo.
I failed this because I saw it in-game and it did nothing that all the hundreds of other guns already do. Except this one just has a bigger explosion with more explodey bits and more attention whoring in general. The idea of add-ons is to bring new and interesting stuff to the game, that allows for more unique gameplay - this and many other add-ons are just new fancy models that do nothing extra, just take up datablocks and diskspace and increase the download times for everyone.
You will notice that every weapon I've released brings something new to gameplay. The shotgun was the first weapon to have kickback and spreading bullets, the flamethrower was the first constantly firing weapon, the flak cannon was the first weapon with multiple bouncing pieces of shrapnel. Those all offer cool new ways to use weapons.
I don't want to see something I took a long time to create being abused to spread this kind of low quality work around to all our users. Go ahead and upload it to mediafire, as long as it isn't using up our bandwidth and server space.