Firearm sound suppressor and methods of manufacture

A method of manufacturing a firearm noise suppressor, comprising the steps of:

• printing by additive manufacturing a firearm noise suppressor precursor part having a housing having a center axis, side walls, a forward end wall, a rearward end wall, and defining an internal volume, having internal baffles separating the internal volume into chambers, and having temporary internal support structure along at least a portion of the center axis;
• boring out a central bore passageway along the center axis to remove the temporary internal support structure and to form openings of predetermined size in the baffles and forward wall and to form an interim opening in the rearward wall;
• removing internal manufacturing debris from the chambers through at least one of the interim opening and the forward wall opening;
• boring out a larger opening in the rearward wall to form an attachment opening;
• and
• providing attachment means in the attachment opening.