Nice rifles, more accurate that the HK91. Depending on the model the SR9, SR9T or the SR9TC they can be quite expensive. If its the base model SR9 it would be very expensive to upgrade to the T and TC variants. the T and TC are quite capable of shooting less than 1 Moa 5 shot 100 yard groups with FGMM 168 grain ammo or tailored hand loads.