By believing the movie, the ballistic helmets have communications build in, and all M41A1 Pulse Rifles have undermounted 40mm breach loaded grenade launchers. Otherwise, its up to the GM to specify.<br/><br/>The game is probably in Extreme because... well, Aliens isn't really PG-13 material, better to waiver on the safe side.<br/><br/>But for certain, anyone with the M111 Combat Helmet has a communications system, soooo anyone who has that will be up. I do, so yes. :)