QUOTE (overcannon @ Oct 31 2009, 04:34 PM)

The underbarrel modification does not mention the under accessory slot, so it is possible to have up to three underbarrel weapons (Ex. An Ares Alpha with a built in GL, Underbarrel Flamethrower accessory and an underbarrel shotgun modification) by RAW.
Actually it does and you can't.
QUOTE ('Arsenal p. 148')
Please note that a firearm can only hold one upgrade of a type, either from a modification or from an accessory. Once a firearm holds a modification of a particular type, it cannot be further equipped with an accessory of that type. On the other hand, if a weapon has an accessory attached to it, this accessory must be removed before a modifi cation of the same type can be installed.
QUOTE ('Arsenal p. 153')
The underbarrel weapon modification cannot be combined with other underbarrel modifications or accessories that reduce recoil (foregrip, bipod, tripod, underbarrel weight). You cannot attach an underbarrel weapon to another underbarrel weapon.