Wow, this thread is almost 6 1/2 years old! Damn, time flies as you get older.....

I guess since it's been resurrected from the dead I'll state that I currently have an equal amount of both Mk318 and IMI Razor (Mk262 clone). Of the two I have zeroed all my AR's to Mk318. So I guess I would say that Mk318 is the 1st choice, and I have a Mk262 clone to back it up.