Full Files to download the model can be found here: https://grabcad.com/library/walther-ppk-training-gun-1 Add on to the WALTHER PPK. Print Walther PPK LEFT and right from http://www.thingiverse.com/thing:19158 Glue left and right together Print WALTHER PPK Silencer Drill out The Walther PPK gun at the barrel with a 7mm drill bit Add 8mm threaded rod in Walther PPK Silencer and tighten down. (optional Glue it in) Tap or screw in the other side of the threaded rod into the gun. Paint rod to match silencer Enjoy being James