Weapon Stats?

Just out of curiosity, is there any official or unofficial stats for various weapons? Or are those mechanics pretty secret? Basically I’m looking at a way to compare the various pros and cons of weapons of the same variety (say… DMR vs. BR).

Go to the halo wikia. That should send you down the right path. Or just watch AmeriCanadian Gamer on youtube. He has weapon guides for every weapon in halo 4. I hope that is helpful.