Nice Shipwreck!
I hear you about the light, the AUG rail is really short, we mounted my light on my roommate's AUG just to see and he couldn't find a good place for the pressure switch. Its also so far back it cast a pretty large muzzle shadow. Almost seems like a 45 degree mount off the top rail would be better.
That's actually a pretty smart idea. I may do that. saw a barrel clamp on mount some have used on AUGs, but I didn't wanna go that route... Nor do I wanna change out the forward grip for an option that has a rail attached.
I'm still selling that Eagletac light. But, a lighter TRL on a 45 degree mount may be the way to go. I have a TRL1 on my PS90. Once I get my sling mount situated, I'll have to see if that will work. On an offset mount, it would still be on the side of the quick detach mount, so it wouldn't be blocked. That's actually pretty smart.
I'm just debating weight wise, but I would like some kind of light. My Eagletac with scope mounts to mount it with was like 1/2 a pound.