Abstract: A disruptor combines a MOG limiter and a cover plate. The MOG limiter is operatively attached to the MOG limiter, such as through direct or integral attachments. The MOG limiter can be a quarter wrap MOG limiter, and the MOG limiters and cover plates can be specifically configured to attach to left and right sides of the combine concave, respectively. The disruptor can further include an over-center latch. A material other than grain (MOG)-disrupting assembly comprises a plurality of the disruptors and a combine concave. The disruptor can disrupt and abrade grain by allowing the MOG limiting components of the MOG limiting inserts to protrude above a top surface of the combine concave, which causes a rippled effect. The disruptor can further employ a staircase-shaped leading edge that disrupts and abrades grain with a similar, rippled effect.