Kiton said:
Given the backpack is probably built for a specific type of ammunition [or at the very least you can't stuff a flamer-fuel pack full of bullets] its probably perfectly fine if one's willing to obtain it for their lasgun instead of getting, say, a better weapon. 2400 lasgun shots is incredible… but its still lasgun shots*.
Although if that thing blows, that's gotta be spectacular.
Probably all works out better with 15kg backpacks anyways: 13 lascannon shots or 1995 lasgun shots.
Now imagine the horrible troubled regiment feeding all ten lasguns from one pack, cables all leading to the carrier…
Edit: given the lasgun's 4kg we're actually looking at 62.5 magazines worth: that's 3750 shots, 3333 for a triplex or long-las, or a whopping 4285 bullpup lasgun shots. A multilaser would be looking at 100/3.5*25 or 714 shots per 25kg backpack…
Perhaps a basic ammo weight per category and type would be better suited to by-weight backpacking…
With maths like this it is clear that the backpack ammo option is just broken as it currently stands and needs to be replaced with a backpack that lists shots not just per type of weapon (las, sp etc) but also class of weapon (las pistol, sp basic etc) and have variable weights dependant on the weapon in question - backpacks for pistols may only hold 5 or 6 clips but wouldn't weight al that much, whereas a backpack for a heavy stubber or meltagun would.
It might take up more space but considering it'd only be added in an errata at this stage it's not like FFG have printing space and costs to consider…