CS Airsoft walks us through his setup of the G&G CM16 SRS AEG as a backup... "In today's video I show you my favorite Backup Airsoft gun. I've been using the G&G CM16 SRS for years. Initially on the primary gun and now only as a backup gun. Nevertheless, it is part of every airsoft game day. In this video I go into detail about all internal and external upgrades of my Combat Machine."