This adapts the Nova N8 rocket launcher 2" barrel to a 1.5" THINWALL PVC pipe. the pipes actual inner diameter is just over 1.7" making this perfect for firing golf balls. They will fly well over 300 yards at 300psi!
Not all sides are equal one is marked with a faint dot on the larger side of the model, that corresponds to the the BOTTOM of the n8, which is slightly wider. This needs two hose clamps to secure the pipe to the barrel, and can be held centered with the spacer, just glue the spacer to the PVC.
There is also a Shell system available, making the n8 a pneumatic shotgun. Shell 2" will fit flush with this adapted installed, making a smooth transition from the shell to the barrel. Shell 1.5" will fit INSIDE of the 1.5" pvc pipe, with its rim preventing it from sliding further into the pipe.
The Nova n8 can be purchased here: https://novapb.com/product/n8-fury-paintball-scenario-nerf-rocket-launcher/?ref=LXG