The Coolest Crossbow - with Scope!

So my niece wanted a pistol with a scope after playing Fortnite, and I thought "why make something you can't shoot anything with?" so I made him this :) It's a handheld crossbow, powered by rubber bands. With the optional scope on top. It's got 3 different kind of arrows: The cool broadhead arrow, a regular sharp arrow, and a blunt arrow I was thinking he could have. There are 2 kinds of scopes: The clip on version that's easy to install and remove, and the mounted version you screw on. For a complete working toy you need the base, trigger, lever, sprints and hammer - and a minimum of 5 rubber bands. 2 are used to propel the hammer/arrows forwards, one is for resetting the lever, one is for the trigger, and one is for slowing the hammer before it passes the front of the crossbow (which could damage the hammer if you're unlucky). 2 rubber bands for the hammer is a bit weak though. I'd use at least 6 :) And for the best result add some lubrication in the barrel where th