Ping Golf Irons G20,K15,i20,s56 and Anser reviewed by Mark Crossfield PGA professional AskGolfGuru. Mark hits the Ping golf iron range and talks about the different launch angles as he hits the large soled G20 and K15 as well as the medium launching i20 down to the lower launching s56 and Anser irons. See which Ping iron might help your golf game in another Mark Crossfield video review to help you play better golf.