These are High Quality 3D printed mock suppressors. Hollow internal, removable cap, 14mm CCW. This model is available in 8”, 6” and 4” total length. These can be used as is but expect minor print defects or printing lines, to make these perfect it is expected to be lightly sanded and painted to match your setup. I can print custom colors as well. These are designed to be used for Airsoft only!