Based upon Hobbes32's original design, but recreated from scratch, this stock extender will add 100mm to your Nerf Retaliator, as well as an extra tactical rail.
Print with the narrow end down, using 0.2 mm layers and supports on the build plate. A small machine screw, inserted into the hole on the side of the extender, should lock it into place on your blaster.
The author hasn't provided the model origin yet.