28mm artillery muzzle brakes

Artillery muzzle brakes compatible with Games Workshop's Basilisk kit or any other barrel with 8mm diameter. can be printed in FDM machines at a slow speed to avoid wall breakage. The walls are 1.2mm thick, so optimized for 0.4 nozzles. The fitting hole in the bottom is 8.3mm size, so a snug fit on 8mm barrels.

Overall heights:
The shorter is 23mm and the taller is 27mm