I'm sure there are good reasons for this to be the case, but since the perk does not convey this fact in the description, I thought I'd share it here. With Demolitionist, you will gain more grenade energy killing an enemy with a special weapon than using a primary weapon. I do not have video proof of this to share but if you'd like to test this out like I did, I used a sidearm and a fusion rifle, both with the perk and I noted the difference. In fact, it seems like special weapons grant almost twice as much grenade energy than primary weapons do. ---------- This might be a type of post that I make every once in a while. Other players may or may not be aware of these facts. But the point of these posts is that these are facts you won't be likely to stumble across in many places because they are so obscure, so they might show up here if you look around.