Also due to the small valve and heavy hammer (around 1 pound) it was not efficient. It was one of the first semi-auto markers on the market. Cycled at 6-8 balls per second. Could also be modified to accept a full auto trigger.
The hammer can be moved out of position into a safety position preventing the gun from being able to fire, like the PMI-3/VM-68 and firearms such as the Sten and MP40. It had a built in back bottle setup that ran on liquid CO2 unlike newer models that run on just CO2.
Many paintball markers we based off this style. Marker shown is on display in the museum and has a muzzle break and carry strap. This museum has 3 of these markers. With a simple restoration this could be an excellent example of a very early semi auto vintage paint ball gun. Original owner said it worked perfectly until he stopped playing and left it stored.