I shoot a remington sendero so it has a fluted barrel, free floating, but other than that I sent it to holland guns for a brake and a new trigger spring kit and thats it. It has a Zeiss 6-20x50 conquest with target turrets so that makes shooting long range a lot easier once you have put a drop chart together. As of right now I can hit 8 out of 10 milk jugs at 950, but gonna work on that range with only a bi-pod and no sand bags.