i bought a barrel super cheap as an experiment to see if i like a 12.5 barrel over a 10.3. the gas block i have laying around is off my dd mk18 and is a single cross pin to the barrel. the barrel i bought has the 2 cross pins for the FSB, but the cross pin holes don't line up from the gas block to the barrel. there is a hole drilled in the bottom of the gas block, so i was wondering if i should tap it and get a set screw so i can utilize the gas block.

dumb idea or go for it?