maintanence and repair part1-How GBB work

Initial position. As the trigger is pulled, the BB is shot out and the slide starts moving back. The pistol will "nod" a little bit.

When the slide hits the rear position, it comes to such a sudden stop that it creates a feeling of "recoil" and tilts the muzzle. As the slide starts accelerating forward, it pushes the grip further against the web of thumb.

As the slide returns to battery, it comes to yet another sudden stop. If you were holding firmly, the sight picture should be as it was before you pulled the trigger.

The valve is knocked open, and gas rushes into the loading nozzle. The floating valve directs it behind the BB first.

With the BB gone and the loading nozzle forward, the pressure is directed to propel the slide back.

The Marui system works as above. Valve open -> BB out!

The gas flow pushes the spring-loaded floating valve forward, allowing pressure to build up for blowback.

Even after the slide has cocked the hammer during the rear stroke, the valve knocker remains forward, keeping the valve open for better blowback.

Only after the slide trips the valve knocker lock, the valve is allowed to close.

The blowback system of the Tokyo Marui P226 disassembled. Notice the white piston head cup inside the blowback frame.

Ever wondered why a high flow valve is able to release more gas? Well, here's why!