Recoil reduction seems to be the buzz technology these days and no doubt the technology works but I guess you have to ask yourself how much recoil is manageable. My experience with the non KO model is that recoil is already fairly mild so it's not something I'd spend the extra money on but I guess if you are recoil sensitive or are shooting boxes of 3.5" shells day after day....it may be worthwhile. Does bit work...yes but do you need it...really a matter of personal choice but I can see it being more desireable on a pump than an auto.