A SIG 556 is very much easier to clean, and I still use GI mags and 5.56.
What a wonderful world. The sidefolder stock is just gravy. That crack about M1 carbine ballistic superiority has me rotflmao. Pistol powered carbines are a dead issue. If you want a chopper, an AK47 will work. If marksmanship is important, make it an AK74, or an AR is far far better. The Sig for me!