Well Mass Effect was explained as all weapons using alloy blocks which the weapon "shaves off" tiny projectiles and hurls them at an incredible velocity. They explained it as the weapons having a nearly limitless supply of ammunition, with the only issue being heat dispersion... which never made sense to me. If you're removing material from a block, you're eventually going to run out of that block... no matter how miniscule the amount. I don't think Destiny works that way, or reloading wouldn't really be a thing. Even in Mass Effect 2 and 3, you're not reloading your weapons, you're just expending overheated thermal sinks. Which again, doesn't really make sense... but I was able to suspend my disbelief for those games. MY problem with Destiny is that while futuristic, they ARE still based on modern firearms in many cases. I mean hell, the shotguns are even pump-action...