I usually run into issues on the other end, it seems that most rifles tend to be overgassed...but my first inclination wouldn't be to make non-reversible mods to set a rifle up to work with the cheapest, crappiest, out-of-spec, low pressure ammo I could find.
If you were to just clean up the port and make sure the rest of the gas system is clear, after that there are different buffers to play with, it seems like that would do it.
I usually end up with a heavier buffer, but then I've never fired a round of Commie steel cased 223 ammo, but I wouldn't expect much from it if I had..
