Hi! First of all sorry for my poor english, hope it's still readable... lol I was looking the topic and 2 or 3 points made their way across my mind. First can you imagine the weight of a space marine with his full armor... then the weight of SM designed heavy weapon...don't talk about the ammo inside... Imagine now the overload condition to "fly" with jetpacks, without speaking of the balance problem. Heavy wdeapon are not so aerodynamic designed. Second Jetpacks are for assault troops who have melta bombs and can jump right on the tank, bunker or anything heavy weapon is needed to destroy so why give them something dangerous for them to carry in the air when a simple meltabomb can do the job ( and once again i'm not speaking of the rarity and the sacred figures weapons are in this universe). finally you could always read rules and try to find all the weak point of them and get two heavy weapons with no supplies of course cause you get the jetpacks, and then... is there any Sm officer who would let you go into battle like that? Don't think so. You're a SM and btw an important asset to the forces of the imperium so you're life is not to be wasted. The two heavy weapon you got are certainly relics of old time and glorious moment of the chapter so will they sent two of then to a man in the front line who will use them as a club 5 minte after the battle begin because he's out of ammo... once more i don't believe it. Third point what the hell are you playing at... i know you can do whatever you like in RPG but this warhammer 40k not a cartoon.f course you can play it as you like but the facgt is that's no longer W40k.
Sorry if i have bored you, hope you will get fun with your game!