My AAP-01 was too long with a silencer on, make a short barrel adapter with 14mm CCW thread to remove the stock barrel.
Open to feedback and suggestions.
Printed with Sunlu black ABS, 0.6mm nozzle, 0.2mm layer height, 5 parameters and 40% infill. Thread works perfectly for me so wouldn't recommend printing on any bigger layer heights.
The author hasn't provided the model origin yet.