I have an extrema and it is an awesome gun. FYI the actions of the Urika and Extrema are both gas but thats where the similarity ends. The Extrema is way easier to clean and is designed to be field stripped. Mine is an Extrema 1 without the "kick-off" and although I don't dispute that the Kick-Off system reduces felt recoil, I think it is unnecessary. The gun is a soft shooter. IMO, the few extra bucks are worth spending on the Extrema.