Arsenal classifies weapons in three sizes:
1) All up to LMGs fit on a normal weapon mount
2) The larger ones need the reinforced weapon mount
3) Vehicle weapons
3) Is perfectly clear, but what is "LMG sized"?
In my opinion: All pistols, SMGs, assault rifles, shotguns, sport rifles, battle rifles and of course LMGs themselves
The bigger ones would be:
MMGs
HMGs
Assault cannons
Missile launchers
Mortars
Snipers - I was unsure about them, but as the snipers in SR are the big long range ones, I put them here. Smaller designated marksman rifles seem to fall under battle rifles in gameplay terms.
Grenade launchers and flame throwers are questionable.
I ruled that most grenade lauchers and flame throwers are smaller than or equal to LMGs. There is a pistol grenade launcher and a SMG sized flame thrower and they can even be part of a smaller weapon as underbarrel versions, so the stand alone versions should be okay too. However, the backpack flamethrower and the 20 shot grenade launcher from Arsenal are not.
Is that how it's intended?