Looking for Nerf Raider CS-35 mods that WILL NOT shoot nerf darts.

Hey, I'm wondering if anyone knows of mods for the Nerf Raider that don't fire Nerf darts.  I've modded a few nerf guns, but I'd like to repurpose my raider to shoot something else.  I'm looking to make it like an airsoft gun or rocket launcher-type gun.  Any and all suggestioins are appreciated.
Thanks!