A sprayer for spraying a fluid can include a sprayer body, a fluid reservoir, a trigger assembly, a flow adjustment mechanism and an air horn assembly. The sprayer body can include a nozzle assembly that defines a fluid outlet and includes a needle arranged within a fluid conduit. The fluid reservoir can be coupled to the sprayer body and be in communication with the fluid outlet and fluid conduit. The trigger assembly can be coupled to the nozzle assembly and be configured to move the needle as the trigger assembly is depressed. The flow adjustment mechanism can be configured to adjust a flow rate of the sprayer. The air horn can include at least one air horn projection that limits rotation of the air horn between a first position corresponding to a vertical spray pattern and a second position corresponding to a horizontal spray pattern.