Abstract: An improved compressed air spray gun includes a conventional compressed air spray head unit connected to a mounting block. The mounting block is fabricated from an integral block of material and includes radially extending passageways intersecting within a medial portion of the mounting block and communicatively connecting at their intersection point with an outlet on the upper face of the mounting block which communicatively connects with the fluid inlet of the spray head unit. The passageways extend outwardly through the mounting block to form outlets on the peripheral side edge portions of the block. Fluid inlet ports are positioned on the lower face of the mounting block and extend into the block and communicate with respective ones of the passageways. Each fluid inlet port has connected thereto a fluid holding canister.