Mechanical paintball gun

A mechanical paintball gun, comprising a frame including a barrel formed with a first operation chamber and a second operation chamber, a firing piston slidably disposed in the first operation chamber, and a hammer slidably disposed in the second operation chamber and elastically pushed by a spring, the firing piston and the hammer being linked with each other to move simultaneously between a first position status and a second position status;

• the first operation chamber having a ball feeding hole, and a portion, which corresponds in position to the ball feeding hole, being defined as a percussion zone;
• the second operation chamber being in communication with a high-pressure gas source and having a valve pack which is normally closed, the valve pack allowing high-pressure gas to pass therethrough when pushed to open by the hammer at the second position status;
• the frame having a ventilation hole in communication with the first operation chamber and the second operation chamber, the firing piston having an outlet channel, and the outlet channel being in communication with the ventilation hole when the firing piston is at the second position status;
• the frame including a stop member, which normally locks the hammer at the first position status, and is linked with a trigger, the trigger being pivotally swingable and when swung it separates the stop member from the hammer, thereby relieving the hammer from locking;
• the mechanical paintball gun being characterized in:
• the frame including a delay mechanism configured to increase a cycle time of a shooting process, the delay mechanism including an extension tube corresponding in position to the second operation chamber, a slidable member and a resistance device being disposed in the extension tube, the slidable member being connected with the hammer so that the slidable member and the hammer move simultaneously between the first position status and the second position status, and the slidable member such abutting against the resistance device that the resistance device provides resistance to the slidable member.