Nerf Mega Thunderhawk. Inline clip. Removed locks, improved seal. (it's amazing what a paint job and simple mod can do to an unpopular blaster deemed "not great") : r/Nerf
Nerf Mega Thunderhawk (1) | Blaster Hub
Nerf Mega Blasters, Accessories & Videos - Nerf
First NERF Review: Nerf's Mega THUNDERHAWK (Longest Blaster Ever) - YouTube