I made this to cover a half inch (0.53in/13.52mm) brass barrel I bought off Etsy
https://www.etsy.com/listing/1391470494/rival-pilot-brass-barrel?ref=yr_purchases
it goes into the Rival pilot barrel and covers the brass part.
Feel free to remix it, I made it for a specific thing but hopefully it helps some people.
Rival_Pilot_Front_end.STL | 43.9KB |