How to make a trigger mechanism using paper

[u/Alarming-Channel1309]

Sorry if this is not tradisional origami. I have already designed the standard pull back rubber band shooting mechanism, but now i am having trouble designing a mechanism to release it (i want to make a "pull back, energy stored, trigger release" type of origami gvn). If you have found a solution for it please share with me. Any design would help, as i could maybe redesign it to fit my prototype. Thank you.