The solid handle stainless steel spray gun barrel is processed with high precision to ensure dimensional accuracy and surface finish, reducing wear and the risk of failure during use. Unlike the traditional hollow handle design, the solid handle provides stronger structural stability and higher pressure resistance. This design not only increases the carrying capacity of the barrel, but also effectively avoids vibration and fatigue during high-pressure operations, thereby improving operating comfort and control accuracy. The handle surface is anti-slip or rubber-wrapped, which further enhances the feel and comfort, and is particularly suitable for long-term continuous operation. The solid stainless steel material makes the spray gun barrel have strong high-pressure resistance and can withstand 5000 psi (about 350bar) water spray pressure to meet the water spraying needs of different industrial fields. The internal reinforced connection design ensures that the barrel is stable and safe during high-pressure operations to avoid rupture or leakage due to excessive pressure.