Airsoft Pistol Grenade Launcher

thingiverse

This is a project I took on one month ago for fun and to own a pistol grenade launcher for my airsoft replicas. I know there are at least two different commercially available launchers and probably more 3D printed ones out there, but I really wanted to design my own. It uses 20mm shotgun gas shells, the PPS SHS M870 shells (red) that I've used, which fire three BBs and a box of five is fairly inexpensive compared to the purple ones. The purple ones should work in theory, but I'm not sure because I don't have any. If you test them and they don't fit, please leave your feedback along with some shell measurements and I'll be happy to make a compatible shell holder. The files starting with "LH" are intended for left-handed players or anyone who prefers. These change the shell holder rotation direction and the safety side. I've also provided STEP files for the trigger and release, which you can modify for your replicas and needs. Please do share them as they could be useful to others. The provided trigger was made for my 1911, but it does work on my Glock, just barely. You'll need the following hardware: - One M5x30 bolt or/and an M4x30 (for the Glock) - Four M2x6 bolts - Four pen springs, which I used with a diameter of four millimeters. Two should be cut to 15mm, one in half, and two to 10mm. The assembly shouldn't be hard, but do watch the video for visual aid: https://youtu.be/YqcDw4h-lOc Nothing is ever perfect, and this design is definitely not an exception. There's one major issue that I might tackle in the future - the flex between the trigger box and picatinny base. When the gas pressure hits the shell, it can occasionally get stuck due to the way it's designed to slide. This is because the trigger box is secured with only two bolts on the upper section. I might have a solution by beefing up the trigger box, but I'll need to change more files for that to happen. All in all, I had a blast working on this project and I'm very excited to field-test it once the weather allows it. Leave your questions or feedback in the comments - I hope you enjoy.