Homemade BB Gun using a One Way Valve

I got bored and decided to make a BB gun using my air compressor. The secret sauce is a one way valve that blocks air from the firing chamber but allows air in the other direction to rapidly propel ammo into the gun. This allows me to tube fed BB’s, even when the gun is inverted. It’s also much faster than gravity feed versions. Watch the video for some action shots and how to make the valve.

3 Responses to “Homemade BB Gun using a One Way Valve”


  • Love this! I wonder – could you put a splitter in front of the are supply and use some of it to feed the bb stream into the larger air flow?

  • take a look at this http://kuba-t1000.com/minigun/index.php it is basically a DIY minigun for airsoft. All plans are supplied, the part you might be interested in involves the BB feeding mechanism.

  • Thanks so much!

    You’re definitely right. The compressor in that video has a 3 way manifold so I can split the air. The air chamber is getting air blown in at a regulated 30 PSI (with losses). In order to get BB’s into the chamber you need to overcome the force closing the one way valve and you’ll need a second 30 PSI source. It’s much more than what we can blow in using our mouths.

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