Spring airsoft grenade, by Myrmecoman

thingiverse

Discover the very first 3D printable spring airsoft grenade! When I saw this 80 euro spring grenade for sale on the web, I told myself, "This is just plastic and spring; it must be printable for 10 euros!" So I went to work, and here's the result. The system is pretty simple but works great! It consists of a spring chamber and a BB chamber. When you put down the BB chamber, you compress the spring and lock the system with the arm. Put in the safety pin, and your grenade is safe. It will explode with a loud noise; you can adjust the sensitivity of the system with the screw that keeps it compressed. Note that you'll have to file the feeding hole for the BBs to fit perfectly in. What you need to mount your grenade: * 1 classic AEG spring (not over 400 fps!) * 4 drill screws, 4mm in diameter, 25-40 mm long * 1 drill screw, 4mm in diameter, 50-80 mm long * 1 screw, 5mm in diameter, with its nut * 1 safety pin, 2mm in diameter See the video for the mounting tutorial. Also see the sensitivity of the grenade and the spreading test in the video! https://www.youtube.com/watch?v=ZBRupehvX2Q&feature=youtu.be Make sure to print the keeper (the piece with the four holes) with 100% infill. Have a good print! EDIT: Added the parts printable separately. A new spreading head for better BB range of dispersion.