More compact veion of my adjustable scar barrel for nerf and homemade blaste with protective cap. Don't have a 3D printer? Purchase one here: Barrel Diameter: 5/8 OD: Used for Calibur, CPVC, PETG Barrels Hardware: 6-32 square nuts 6-32 5/16" Flat Head Screws 6-32 3/16" Pan Head Screws 10 lb / .012 Dia Fishing line (or similar) Bamboo skewer or similar for stringing tool