Got my box today. I am happy with it. the 150mm measure that has a tolerance of -0mm+1mm, is clocking in at 150.05mm, so if it fits my box it should fit pretty much everywhere.
My gun fits pretty tight, since I don't have an heightened mag catch, I have to take the slop out of my mag to push it in.
So in competition, are you allowed to push hard on inserted mag and rear sights? In pic it doesn't show, but mag is inserted and couldnt be tighter, I have to insert top of gun first then push the magwell in the box in last.