i free floated the forearm on my optima and it didnt do anything for accuracy. I left my new optima factory.

With the full stocks like on the mountaineer and other muzzys, im sure it can help a great deal. Worked wonders on that winchester x150 i had years ago + on many other of my rifles.

I wouldnt pay for it personally, especially since it doesnt involve having to do much to get your barrel free floated.