About this 3D model

There are a lot of instructions for making a spring clothespin into a toy "gun" for shooting matchsticks or toothpicks. They work OK, but need some fiddling to get them cocked after shooting--the spring and matchstick often wedge, or the spring refuses to go into its latching slot. Printing your own allows making some improvements, like adding a plunger with a stop and a shaped end that transfers the spring into the cocked position. And, it has sights...