Flynn is the owner of the Flynn's Mace Market in Falador.
His shop is located between the barbershop and the general store which is just west of Falador's town square. He sells bronze maces, iron maces, steel maces, mithril maces, and adamant maces.
This shop is rarely used as a mace is a very uncommon and inefficient weapon, and any maces players need are usually just bought at the Grand Exchange.