Ping G2. The Ping G2 Iron Series represents the most forgiving iron Ping has ever designed. The Ping G2 features several new design advancements, including a centre of gravity moved away from the face, and a wider sole for improved launch and more forgiveness. A new sand-blasting process improves ball-to-face contact for added control and consistent performance across the face. Ping G2s were the biggest selling iron in the US in 2004.