You just haven’t fired anything on full rock and roll or big enough yet then. An AR is basically an oversized 22. Kind of like a stroker engine. I mean diameter is the same, .224 but the case length (stroker) is a hell of a lot longer. That said, the gas impengement system of the AR absorbs a lot of the recoil. Now come fire a Lahti or even a M82A1 and feel that concussion. It’s like riding in a full out max wedge Mopar. Fire something like an M2 or an MG42 and full tilt, and it’s like strapping in to a top fuel dragster.