Magazines - Magpuls PTS Emags work wonderfully.
I have no idea if they make windowless mags (personally I don't like them anyway - I understand your point, but I just feel that the magazines with windows look far better)
IRRC, CK uses windowless magazines in his ICS so he'd be the man to ask, but I could be confusing his L85 with someone else I've seen on Arnies.
The flash hider depends entirely on how ICS fixed the flash-hider on your L85. Some L85s have a simply grub-screw, others have threaded barrels.
I have no idea if they make windowless mags (personally I don't like them anyway - I understand your point, but I just feel that the magazines with windows look far better)
IRRC, CK uses windowless magazines in his ICS so he'd be the man to ask, but I could be confusing his L85 with someone else I've seen on Arnies.
The flash hider depends entirely on how ICS fixed the flash-hider on your L85. Some L85s have a simply grub-screw, others have threaded barrels.