Not keen on Gas myself but does anyone else think the front end looks a bit odd, more specifically the hand guard? I think my G&G one looks more realistic.
The handguard is the current issue handguard on L85s. Around 2007-8 the old A1 style plastic handguard was replaced by that one - it's more ergonomic, and has points to mount strips of RIS and the LLM(01). The only difference is that it's a 1:1 copy of the ICS handguard, rather than the real version - the ICS model being slightly bigger to allow you to put a very big battery in it.
That's my one fault with ARES - if you want a 2007+ L85 (non DD-rail handguard) you have to fork out about £50 for a new handguard.
The ICS/WE adaptor kit - like I said, Madbull have said they're going to release one. They just haven't said when, or how much for.
18mm rail? I thought they'd actually put the 19mm rail on (if they had, you could buy the Hornbil SA80 ACOG mount from RSOV for £20-ish).
WE's orrigional plans were for the rail to be removable, much like the ICS rail, to allow you to switch it for a 20mm RIS - but, I can't remember if WE actually did make it removable.