im wondering if i can fit an m203 grenade launcher onto a standard handguard on one of these http://www.wolfarmouries.co.uk/airsoft/bb/...ct&id=AEG17 without sacrificing battery space? im getting this rifle soon and would like to know before i go and waste money on a grenade launcher that wont be compatible im unaware of a RIS handguard that i could fit that will allow me to have a battery in this, im pretty new at this so any help would be welcome. thanks