As the only sc marker I have is my phantom, I carry all kids of different options for it.
I carry 2 sight rails, a ghost ring, an offset sight rail, a cp rail and ccm on/off, 7" of macro, a bba, rf body(just in case) a drop out changer, a complete set of internals, bottle of oil, and a lapco sc/oc adapter. As for my tool kit: set of detent rings, 3 new feedgates, all kinds of screws orings and seals, 2 spring kits, and an assortment of allen keys.
Anything worth doing is worth over doing, Moderation is for Cowards
"Make (your attacker) advance through a wall of bullets. I may get killed with my own gun, but he’s gonna have to beat me to death with it, ‘cause it’s going to be empty." Clint Smith