Slug power kit isn't really any power kit at all. Ted always made a video talking about it. You can achieve the same result by lining up your transfer port to the pellet prob port. This slug power kit is just advertising. I own one and it boosted my fps by like 5fps. Lmao. I wouldn't call that power kit. Also matt from Africa talks about how good it is cause you can adjust the depth of the pin probe. While that is true you can adjust it, it makes the mag doesn't cycle correctly and get jams when you try to cock back your gun. So imo the adjustment depth is trash.