By reputation, the Airsporters were always the most powerful guns when I was a nipper, in reality 9-10ftlb but with a nasty harsh shot cycle and quite a kick, they certainly felt powerful, the mk3 was , by comparison very civilised and far more accurate, similar power but didnt feel like it. To our pre teen minds, the airsporter was a canon and we all wanted one!! Having had both in later life, the airsporter was quite unpleasant to shoot, but the mk3 was a delight. I like to revive abused airsporters but always move them on with no regrets, I do, however regret selling my mk3