Report Initial Impressions of the TM SOPMOD M4 AEG in Rifles (AEG) Posted July 19, 2010 yeah, sorry Anakchan.... It is SOPMOD related, because I want it for my SOCOM (my bad). Just in the process of upgrading my barrel. Was going for a Prometheus barrel, just was wondering over the hop rubber. Not being an AEG user normally (boltie for me), I'm a little out of date on all this. I'd heard the Shark was pretty good, then I see everyone raving about the Firefly one, so was just after some feedback on it.