Free: Contests & Raffles.
Take a look at the Shepherd 5.56. It has a built in range finding ballistic recticle set up. The 5.56 has 9 inch circles graduated out to 1000 yds. Pick the circle that fits and pull the trigger.
Good thoughts AWS, but I've never needed a cheek rest on any gun I've ever shot But I also won't buy a gun be it rifle or shotgun if it doesn't fit the way I want it to. But that's just me and the way I was taught, everybody has there own way of shooting. And I still prefer 50mm.