Extremely happy! It's recoil is very light thanks to the JP brake and it's scary accurate. Truly a unique rifle. The ambi raptor handle is a must because the mega handle is garbage. getting ahold of the tiny handle with the powerful AR10 buffer spring is a challenge with the scope in the way.
Have one very similar already built. Noveske barrel, JP hand guard and brake. You're gonna want a rainier arms raptor handle and you won't need the PRS extension. Stonefirearms.com sells a great Maten LPK for cheap too!