Factory recommended break in - shoot 200~300 rounds, then clean it. That's it. It's a chrome lined bore and chamber, and doesn't need an elaborate break in.
Mags are critical. Buy USGI, Thermold or maybe Orlite ONLY. (orlites may need some trimming to fit)
I personally avoid Wolf steel cased ammo. Works good for some, but others have problems. Low powered, poor accuracy, can wear some parts faster, not worth it for me.
Cleaning kits - get the new USGI kit - www.otisgun.com
. It's a pull through cable system that works great and is MUCH safer for the gun than the older metal rod USGI kit.
Check out alternate Zeroing Methods at ]communities.msn.com/TheMarylandAR15ShootersSite&naventryid=100[/url}. Col. Santose has a better zero than the military zero.