360 build for dart swinger

KB has forged and hyperutecics.

I often do the KB hyper pistons. Cheaper than forged and strong, but fragile at the same time because of the added silicone. You can not allow detonation run rampant on these type of slugs.
A nice thing about the hyper slugs is the can run very tight in the cylinder. They run quiter because the rock less.

Most of my builds have been with the KB hyperU pistons.