the sportsmag has the mag adjustment slide around the rim of the side plate, the older green model has just a smaller slide on top of the side plate and the sports mag does look a lot better. ive heard that the problem with the sports mag is because you have a longer slide area they are prone to getting sand lodged under it and the older model performs just as well and is cheaper.
i thought there might be problems with the mag slider on the sports mag. so i bought the orange mag elite no problems with them. if only abu made the 7000 s with mag breakes now that would be great. cheers andy