Hvy: no, i think the packaging is the same.. The only way I knew my is probably is on the secondary batch is when my supplier told me that JG have stop producing the G36c for a wee moment to fix something....
TBH, i think the only way to tell is to fire the damn thing yourself, since I am quite sure that the ROF and Power of the gun is higher, hence the sound too, other then that, I dunno....
Where is Darklite when you need him the most?
Woozie