Crossbolt I've been having a lot of fun just messing around with it while it's still stock. Even though the top-slide prime isn't the most comfortable thing in the world, the fact that it's a bungee-powered bullpup-style clip-fed (or mag-fed) blaster that LOOKS cool makes this a winner. There are some that are already claiming this to be the "Best Blaster of 2015", and I can easily understand why.
One of the things I liked was that this blaster is using a new-to-me firing mechanism: the bungee. Obviously the easiest way to crank more power out of the blaster is to upgrade or modify the strength of the power this mechanism uses. As with springs that are commonly used as the source of power for Nerf blasters, the bungee cord can be more powerful if it has more resistance. Even without a complete overhaul of this blaster, you can easily upgrade the stock bungee by tightening it on either end of the bow arms. To do this, all you need is a screwdriver to open the panels covering the ends of the bungee cord so you can access the ends and tighten them. Once you've done that, close up the panels and get to blastin!
Check out the video below to see what I mean!