A sprayer configured to spray fluid, the sprayer comprising: a hopper configured to hold the fluid; and a spray gun mounted to the hopper and configured to receive fluid from the hopper and spray the fluid onto a surface, wherein the spray gun comprises: a gun body; an air passage extending into the gun body, the air passage configured to receive a flow of pressurized air; a connector configured to attach to a hose and supply the flow of pressurized air into the air passage; a connector chamber in the gun body, the air passage configured to provide the flow of pressurized air to the connector chamber; a first air pathway fluidly connected to the air passage, wherein at least a portion of the first air pathway extends through the gun body from the connector chamber; and wherein the first air pathway is configured to direct a first portion of the pressurized air to a nozzle of the spray gun, the first portion of the pressurized air configured to propel the fluid through the nozzle; a second air pathway fluidly connected to the air passage, wherein at least a portion of the second air pathway extends through the gun body from the connector chamber and wherein the second air pathway is configured to direct a second portion of the pressurized air to the hopper to pressurize the hopper and force the fluid from the hopper into the gun body; and a pressure regulator, mounted to the gun body and disposed in the second air pathway, configured to regulate a pressure of a flow of pressurizing air flowing to the hopper. a hopper configured to hold the fluid; and a spray gun mounted to the hopper and configured to receive fluid from the hopper and spray the fluid onto a surface, wherein the spray gun comprises: a gun body; an air passage extending into the gun body, the air passage configured to receive a flow of pressurized air; a connector configured to attach to a hose and supply the flow of pressurized air into the air passage; a connector chamber in the gun body, the air passage configured to provide the flow of pressurized air to the connector chamber; a first air pathway fluidly connected to the air passage, wherein at least a portion of the first air pathway extends through the gun body from the connector chamber; and wherein the first air pathway is configured to direct a first portion of the pressurized air to a nozzle of the spray gun, the first portion of the pressurized air configured to propel the fluid through the nozzle; a second air pathway fluidly connected to the air passage, wherein at least a portion of the second air pathway extends through the gun body from the connector chamber and wherein the second air pathway is configured to direct a second portion of the pressurized air to the hopper to pressurize the hopper and force the fluid from the hopper into the gun body; and a pressure regulator, mounted to the gun body and disposed in the second air pathway, configured to regulate a pressure of a flow of pressurizing air flowing to the hopper. a gun body; an air passage extending into the gun body, the air passage configured to receive a flow of pressurized air; a connector configured to attach to a hose and supply the flow of pressurized air into the air passage; a connector chamber in the gun body, the air passage configured to provide the flow of pressurized air to the connector chamber; a first air pathway fluidly connected to the air passage, wherein at least a portion of the first air pathway extends through the gun body from the connector chamber; and wherein the first air pathway is configured to direct a first portion of the pressurized air to a nozzle of the spray gun, the first portion of the pressurized air configured to propel the fluid through the nozzle; a second air pathway fluidly connected to the air passage, wherein at least a portion of the second air pathway extends through the gun body from the connector chamber and wherein the second air pathway is configured to direct a second portion of the pressurized air to the hopper to pressurize the hopper and force the fluid from the hopper into the gun body; and a pressure regulator, mounted to the gun body and disposed in the second air pathway, configured to regulate a pressure of a flow of pressurizing air flowing to the hopper.