tontonan
Semi auto, features qev extinguisher airsoft loader and push valve...
PCP Valve New Design
PCP Air Gun Valve | PVC Build
Making a Air Gun based on solenoid valve (homemade pcp air rifle)
pvc air soft gun with qev system.
How PCP Hammer debouncer works, Hammer zero bounce mechanism
full auto qev bb gun
Video Request: QEV mods. return spring and diaphragm hole