My 5.4 Inland is as built with the original HI wood. It has an annoying handguard. One side sits higher than the other. It partly obscures the front sight but since it shoots exactly to point of aim at 100 yds, not seeing the whole front sight isn't more than annoying. Looking down the handguard on my 5.6 Win is much more satisfying to the eye and it also shoots exactly to POA at 100 yds. My guess is that Inland built a whole lot more carbines than anyone else and a problem like that isn't a deal killer.
So the sight channel was not cut deep enough or is off center? I would love to see a pic of that. I had to deepen the sight channel on my repro stock handguard since it also obscured the front sight. You could see the post but only the top of it.