It's not that I've never played Halo 4 (I have, personally don't like it though) it's that those stats on a weapon in regards to Destiny are shit. If the objective was to try to recreate a weapon from Halo, they did good. The stats on the weapon (assuming all the perks are unlocked) represent the weapon extremely well in a Destiny environment. The thing is, those stats and perks are terrible on Pulse Rifles in Destiny. There'd be no point in using it; it'd be a waste of an Exotic slot.