homemade bb airgun 1

This is my new made airsoft bb gun (it works with 6 mm platic balls; 0.12g). In this design I was working with the stacked tube working as I wanted to make a semiauto gun; based on most spyder paintballs guns. The whole gun is made from scap (everything homemade) from the valve to the soldering of the piping. Further, the gun shoots above 100 m/s (around 360fps). I tested this using a mp3 player and a measured out range for a target. When one shoots you can hear two loud parts(when the gun shoots and when the ball hits). Using audicity you can c how many miliseconds is between the two. By subtracting 340/range from the time that u got you get the exact time (bc the speed of sounds goes at 340m/s and affects your recording). So average speed= distance/time taken. Like this I made an easy and cheap chronograph. The gun runs on compressed air at around 5bars. As can be seen it is stored in a coke bottle. This way you can shoot about 30-40 times on a 1.5L bottle (0.4 gallon). The guns speed can be regulated'' by the spring which drives the hammer into the valve. The gun can be loaded at the top but I still have to make a magazine. Everytime the gun is shot the barrel slides forward due to friction of the ball and air on the inside of the barrel and thus opens the breech and allows for reloading. Once the gun is recocked (as seen in the picture) the breech closes again due to a pin which connects the barrel and the hammer setup.

Author: antonkoen
Keywords: bb gun airsoft homemade
Added: December 16, 2007