Tomcat Extended 16mm Barrel Adapter

Cobbled together in Tinkercad to put an extended 16mm barrel in a Dart Zone Tomcat. May need a bit of e-tape on both sides of the adapter to make it a tighter fit? Can't remember, been a minute since I opened up my tomcat. You may need to play around with the tolerances a bit based on your printer and barrel. Wrap some e-tape on the barrel right behind the adapter to help secure the barrel.