How to make an air gun? I will tell you

In this video clip I am going to show you my pneumatic air gun that I assembled from some different plumbing aids and appliances.
I am pumping air into the reservoir to build pressure of approximately 7-8 bars. In place of any ammunition rounds I use the dart-shaped spikes!
The plastic bottles pumped with some compressed air can be used as the targets. When hitting the target, I added some flour therein to do the cool wow-trick.
This is beautiful home made air gun.
My air rifle was quite powerful. I was impressed with the result. Therefore, I plan to make air shot gun. I will make this gun for you!
Watch the video and make a gun at home.
Homemade air gun or home made air rifle?