Bumping this thread. I’d be in for a barrel with an integral flash hider for sure.
If I were to choose specs it would be as follows
1:8 twist
.223 wylde
4150 CMV
.750 gas block diameter
Three prong flash hider with closed tines
Mid length gas
I think mid length gas would balance the rifle very nicely. If the profile was fairly thick up to the gas block, then basically pencil (0.7) after the block the weight of the rifle would be very light up front. It would be a very nice shooter for 3gun