You could go with a Troy Battle rail, which has an inside diameter of 1.57"
OY-HZ-T20574-SRAIMV113FT00
Yes, the Noveske Marked Superlative Adjustable Gas Block fits barrels with a gas journal diameter of 0.750" like the Noveske CHF Chrome Lined Lo-Pro Barrel.
Yes, the Noveske Marked Superlative Adjustable Gas Block will work with a DDM4V7 and MFR rail.
Yes, this Noveske Marked Superlative Adjustable Gas Block is the same as the Superlative Arms Adjustable Bleed Off just has the Noveske logo.
Yes. The Noveske Marked Superlative Adjustable Gas Block will work with any barrel with a .750" gas journal.
The Noveske Marked Superlative Adjustable Gas Block does come with pre drilled holes.
Yes, it will work with your setup. The gas vents out the front of the gas block.
Yes, this is a low-profile gas block, with an outside diameter of 1.383"
The MK14 rail is too narrow at 1.27" inside diameter, as this gas block has a 1.383" outside diameter.
No it will not, this gas block has an outer diameter of 1.383" and the rail has an inside diameter of 1.35"