Nerf Rifled Barrel Attachment (SCAR)

Check out a new and improved version here: https://www.printables.com/model/857337-fast-printing-customizable-rifling-for-foam-dart-b

A minimalist SCAR with 12.4mm ID flutes. Attaches to 16mm OD barrels. New version has improved fit.

Required print settings: Vase mode, no bottom layers, brim, 0.4mm line width. Print with the flared end on the bottom to counteract elephant's foot.