Nerf compatible gun powered by rubber bands

SummaryDescriptionThis is a Nerf compatible air gun fully 3D printed, powered by rubber bands. The strength of the gun is controlled by the number of rubber bands installed. I'm using white lithium grease to lubrify the inside of the chamber, and the gasket is printed in flexible filament (TPE 80A).You need two small rubber bands (~7/8 inch) for the trigger action and pull back effect, and two (or more) longer ones for the piston.It works surprisingly well, I'm quite happy of my design! I must admit I spent a ridiculous amount of time working on this :P Its made with FreeCAD. As you can see tho, its far from an "esthetical perfection"... I'm not very talented on the artistic side, feel free to remake it so it looks better! :-)The rail should be compatible with Nerf accessories, but as I didn't had any on hand, I designed it against a scope I took on thingiverse so it may not be perfect...PrintingAll the STLs are positioned the way I print them.The explodedView.s