The generic Silly Spigot Scar is already a great design, however at higher FPS on blasters you would want a less aggressive rifling angle for increased accuracy.
Print with z seam at sharpest corner
3 Walls
Wall ordering outside to inside
15% infill
(recommend to print in orange/yellow but any colour is fine)
The author remixed this model.
The generic Silly Spigot Scar is 12(0) degrees rotation
This version is 6(0) degrees rotation
This version also includes 4 lines of rifling to help compensate for the lower degree of rotation