A muzzle i designed for the spamf with the shortened barrel by Eric1218 on Thingiverse: https://www.thingiverse.com/thing:5132605

This model does not require a brim or supports and is best printed at a 0.15 mm layer height.

I have included a 16.08mm and a 16.12mm variant for wider and narrower barrels. Print the 16.12mm version to start as should work best for most people.