[jamuke]

I had the Shooters design slide and outer barrel. The outer barrel would not correctly seat seat the hop up unit and inner barrel correctly and was unusable.

Presently I have the Ra tech steel slide and outer barrel.
Compared to the SD set up the ROF is much lower as the steel slide takes longer to cycle.
I don't have any cycling problems but I do have stronger springs installed, I also have an NPAS installed.

I had also run the Ra tech outer barrel with the SD slide and didn't see any wear issues on the alum. slide.

The Ra tech slide and outer add a bit of weight to the pistol and I think it just looks totally cool. ( pretty pricey though)