Fire-4-effect has a P07 package. I've had Glocks slides and finished in Cerakote by JagerWerks, a PVD slide from Unity Tactical, and black nitride by BattleWerx. Most shops outsource PVD and blank nitride, so there's usually an additional 2-3 week lead time. Cerakote is often done in house, so the turn around is quicker, and you can choose from a ton of colors of that's your thing. One caveat about Cerakote is that in some cases the coating can be applied thick enough to cause malfunctions until it's worn in, especially around the breech face and slide/barrel lockup areas. I prefer black nitride. It's the most boring looking, but it's more durable than Cerakote, and doesn't wear in the corners as much as PVD. PVD is slicker than the two though. I've never tried DLC, but from what I've seen, black nitride is the way to go for a hard use gun. Whatever you decide, post pics!