- King77

king177FX King .177 Cal. PCP Air Rifle, GRS Green Mountain KING. A king is born.. With the all-new FX King we strive to keep pushing boundaries and keep innovating in many different ways.Description KING. A king is born.. With the all-new FX King we strive to keep pushing boundaries and keep innovating in many different ways. The FX King is a powerful and pure hunting rifle