The Rad design are showing up on more rifles all the time. Seems to have a following with some F Class shooters. The high end Rad designs are hydraulic and great once you get them set right. The cheaper designs are coil spring and, as they say you get what you pay for. The hydraulic units can interfere with adjustable combs so beware.
The Rad and the Bump Buster are similar and both use industrial shock absorbers, like ACE. The difference is how they adjust lop. I've got a couple and I prefer the RAD. Adjusting them is a little quirky. You sometimes need to apply reverse logic as setting them up to tame down heavy loads and then shooting lighter/faster loads will not be softer. We use a lot of these shocks in machinery we build and sometimes bigger ain't always better. If you always shoot the same loads within reason they are good to go, if you are shooting a wide variety of loads they don't always, stay in tune, if you will.
The Rad and the Bump Buster are similar and both use industrial shock absorbers, like ACE. The difference is how they adjust lop. I've got a couple and I prefer the RAD. Adjusting them is a little quirky. You sometimes need to apply reverse logic as setting them up to tame down heavy loads and then shooting lighter/faster loads will not be softer. We use a lot of these shocks in machinery we build and sometimes bigger ain't always better. If you always shoot the same loads within reason they are good to go, if you are shooting a wide variety of loads they don't always, stay in tune, if you will.