While it might work, I cannot justify the expense on a the Ruger American. The brake will be worth more than the rifle, and these rifles are not made for long term hard use. They are designed for the occasional shooter who shoots box of ammo a year. If you want to shoot more than that you need a better rifle.
Recoil should be a non-factor, but I can see it helping with muzzle control on a semi where rapid fire is more likely