I've got that 42" Midway case as well and it's a nice setup. I will say that the outer mag pockets are kind of smallish though. Pretty tight. Maybe they'll loosen with time and use.
The case is well made, sturdy, strong zippers. My AR fits fine with a large red-dot sight on top no problem. I do wish the two internal straps for holding the gun were in different spots, and were attached to the inside of the case, not free-floating. Makes it a pain sometimes when you try to un-strip the Velcro and they slide out of their holding straps. I may rivet or sew them to the case.
All-in-all, you cannot beat the price for the quality you get.