Best way to install compensator?

[Klem]

These work great for barrel and compensator installation. Keeps stress off the upper.

https://www.botach.com/kley-zion-barrel-...receivers/

But not the barrel itself. You don't want to hold the barrel at one end while you apply rotational torque at the other end. Get as close to where you apply the torque as possible and isolate as much of the barrel as you can.