DIY Semi Auto Air Rifle Made With QEV

In a previous video, I showed how to hook up and use a QEV for an air rifle or cannon. I used that QEV to make the air rifle shown in this video. The QEV has been matched with a three way solenoid valve. The three way solenoid valve allows the air reservoir to fill, and when it is triggered, it pilots the QEV, firing the air rifle. This setup is semi auto, each press of the trigger switch pilots the QEV. This air rifle has two barrels for it, a .22 Crosman rifled barrel 24" long, and a 36" long .25 steel tube barrel. The .22 barrel has a brass breech assembly with a bolt, allowing bolt action loading of .22 pellets. The .25 barrel has a similar brass breech for loading lead pellets, but also has a 20 round magazine for .25 steel BBs to allow semi auto use. Accuracy is good with the .22 rifled barrel. No problem hitting pop cans at 25 meters while hooked up to 120 psi shop air. The .25 barrel is not rifled but still shoots well enough for my 10 meter indoor range. This air rifle can also be hooked up to my high pressure air setup. I have fired it using 300 psi and it works reliably. Shop air at 120 psi is more convenient, and this air rifle works very well at 120 psi. It has a Tasco 3-9 power scope. The stock is made from steel electrical conduit tubing with a plywood butt. Power is provided by a lithium polymer 12 V battery inside the handgrip. The brass trigger presses a micro switch that switches the solenoid valve.