I invoke the deep magicks of nerfhaven. Is there a reason we never used doorknob latches as catch mechanisms? They’re already shaped perfectly for a plunger to slide over them, and they come with a built-in trigger mech. Did they just not have strong enough springs, or was there another reason I never saw these in the pre-3D printer days?
The doorknob latch holds back the plunger in its firing position, and turning the knob acts as a trigger and releases the plunger.