Patent ID: 7634991

Claim:
A paintball gun percussion mechanism, comprising: a barrel being a hollow tube and containing a slide guide cavity, a first air chamber, a second air chamber, a first airway, a second airway, and a first airtight ring, an internal diameter of the slide guide cavity being smaller than that of the first air chamber, an internal diameter of the first air chamber being smaller than that of the second air chamber, the slide guide cavity, the first air chamber, and the second air chamber connecting through one another in sequence, the first airtight ring being disposed in the slide guide cavity, a first gradation being formed between the slide guide cavity and the first air chamber, a second gradation being formed between the first air chamber and the second air chamber, the first air chamber being located between the first gradation and the second gradation, the first airway being disposed next to the first gradation, the first airway connecting through the first air chamber, the second airway being disposed next to the second gradation, the second airway connecting through the second air chamber; a propeller being a hollow tube disposed in the barrel and having an outer diameter corresponding to the internal diameter of the slide guide cavity, the first airtight ring holding against an outer wall of the propeller, at least one retaining wall, a second airtight ring, and a first buffer ring being disposed on the outer wall of a middle section of the propeller, an outer diameter of the retaining wall corresponding to the internal diameter of the first air chamber, the second airtight ring holding against an inner wall of the first air chamber, the first buffer ring being disposed between the retaining wall and the first gradation, an outer diameter of the first buffer ring being smaller than the inner wall of the first air chamber; and a bolt fixed to and closing up the second air chamber, a plate insert being disposed at a front end of the bolt, the plate insert being disposed with a third airtight ring to relatively close upon an inner wall of the propeller.