@Funnysunflower You could get some Replacement Rails instead of using Nerf rails you can use Picatinny Rails so you can use more attachments like AR Grips and Get a Worker stock like a L Shaped collapsible stock
You could also paint it which is a great way to customize your blasters. I really enjoy painting my blasters. Just remember to use bright colors, and if you use black use it in very small portions.