Nerf Rival Hypnos Fore-grip

Once I printed the Hades fore-grip from [shootingfoam](https://www.thingiverse.com/thing:3569146) I had a hankering for a fore-grip on my Hypnos that didn't make me hate myself and the blaster every time I used it. The provided fore-grip is clearly an afterthought or - giving Nerf the benefit of the doubt - an invitation for modification.

So here we are. Assembly is pretty straightforward, insert the loop and the pins into one or other of the two fore-grip sections and press them together onto the blaster. There are points to reuse the three self-tapping screws from the original fore-grip, but for me it wasn't really necessary.