MST has a series of pneumatic injection guns for projects requiring multi port injections or very large volumes of resin product that require an operator to inject over a long period of time. Each of these guns are designed to accept our unicartridge, single cartridge, or plural component cartridges as well as bulk dispensing for large projects. Each gun is manufactured to an ergonomic design for continued use and air pressures are adjustable to control product flow. Each gun has an air dump valve that stops product flow instantly. Suitable for 100 psi supply air with various thrust ratios depending on the product that is being dispensed.