40mm trip mine

thingiverse

Once printed, you'll require four 3mm x 10mm dome aluminum bolts to secure the firing pin supports. Then, a 2mm thick pin is needed, which I achieved by drilling a 2mm hole and cutting it down to size. This pin holds the firing pin in place against the trigger. You'll also need a 5mm bolt and nut to fasten the trigger to its support. After inserting your 40mm grenade into the long tube, attach it to the main holder and secure both parts together with a 5mm thick O-ring. The size of the O-ring is up to you; the tighter the better. Next, add fishing line to the trigger, then feed the line through the hole below the trigger and make it as long as desired. Finally, tie off the line on the other pin and stick both into the ground. When someone trips on the line, the 40mm grenade will detonate, securing your kill. Happy printing! Update: Single STL files are now available for printing individual components in case you break anything. Last update: January 2nd, 2019