Is there any problem with using a gasblock with a porthole that has been drilled 90 degrees then pressing it onto a barrel with a 45 degree gasport in it? I am making an M-10 style rifle with a front sight/gas block combo that is drilled 90 but the 7.62x39 Izzy barrel, to my knowledge (don't have one in front of me), has a 45 degree gas port in it...
Should be okay as long as the 45 leads right into the open 90, right?