Perhaps worth the cost - Walker Defense Research Nero Compensator

Helps with up/down force and recoil. Barrel stays steady, easily allows next shot. Looks great, no bad-a$$ actually. 4 stars because it won't stay in position without pinning on my Rugar Charger 9mm anyway. Yes I used the crush washer and perhaps with a high heat lock thread it may solve this, but I don't like to use the stuff if I don't absolutely have too.
It is very loud, you won't be able to hide after a shot. Don't know why it is so expensive but I did order another one for my AR-15 so I'll let you know how it stay's in place. Perhaps thats why it's so expensive, they know you will pay for it if you care that much about looks.