Yup only the older spyder detents fit. The new style have a larger head on them. They'd still work, you just have to trim them down to fit in the hole properly. I'd also go with the older style intimidator detents though, they last way longer and you can find them in even tougher versions if you'd like.
Etek 3LT grey/black f/s
Valken Proton greyish/black f/s
68 4500 PE stubby, LP output f/s
68 4500 AIR tank(no reg) f/s
Creed/demon eyes f/s