Simplest toy cap gun

I made maybe the simplest cap gun toy you can find:)  It was fun making it and then playing with it I taught others might enjoy it as well. I worked a little to optimize it, but there is still room for improvement. It has the laziest trigger mechanism ever ( you rotate the bolt into a notch to cock the toy and push it with your thumb for firing), but it works great ant the necessary hardware, printing and assembly time are minimal. You might as well print it and see if you like it:)

You need 

• a spring around 9mm in outer diameter or smaller and 35mm in length. The tougher the better. I got mine from a cheap spring kit
• a m3 screw to act as a striking head. Mine is sunk but it doesn't really matter

Assembly

Be careful not to mess up the order. After installing the barrel is hard to go back. Fist screw in the m3 screw in the bolt face. Then put in the spring, install them both in the frame and rotate the bolt to lock it. The barrel is a press fit from the side and a little tricky to get right, but very secure. You might want to use a vice to press it in or some other tool. And that's it!

Safety

Be careful not to catch your finger between the barrel ant the bolt. Also it makes loud noises so be mindful of that. The barrel is blocked for legal reasons. And don't forget the most important safety rule: don't forget to have fun:)