I'm an AR owner......and I think this is dumb.
There are too many, "if you don't do x then y shouldn't happen" in there. Also, the 5.56 may be a little more plentiful here, but 7.62 is still cheaper and until they stop shipping it here, is just as available.
Also, in converting it to 5.56, mags will be more expensive, the bolt and other parts are not interchangeable (therefore more expensive), and I'm sure you'll have to fork up more for the initial price of the gun.
If it aint broke, don't fix it.
P.S. If I'm wrong, let me know.