In depth comparison of the FN SCAR vs. AR-15
Hootiewho has posted an incredibly comprehensive article on M4Carbine.net comparing the FN SCAR and AR-15. He went as far as to do a temperature analysis!
This article is well worth reading.
[ Many thanks to Vitor for emailing me the link. ]

Why not add another “veteran” to the mix (SCAR is not it!) – a proven success without the AR’s 9 million changes, and still changing…add the Steyr AUG!
Spiff
The carbine lenght gas port does not help a DI system at all, ridiculously high rate of fire.
Interesting article. I hope the author has thick skin because I can envision some jabs and barbs from the AR fanboys. What I personally found most interesting, as an “AK guy,” is how much cooler the Norinco Kalash ran than the other weapons.