Air Gun / Air Rifle Silencer Moderator Suppressor 1/2" UNF Thread

thingiverse

This moderator is designed specifically for air gun use only. Do not attempt to mount it on any other type of gun. Follow local laws regarding moderators in your area. In Germany, the law requires that this type of moderator be marked with a warning label indicating its intended use: "only for F Luftgewehre." The "F" must match the five-pointed star symbol for free firearms. This moderator has a diameter of 35mm and is 152mm long. It was designed to fit an air rifle or pistol with a 1/2" UNF thread. The inside bore of the 5.5mm parts measures 7mm, while the 4.5mm version measures 6mm. The entire design is 3D printed, but you will need to add sound-dampening material to the chambers. I am still experimenting with different materials, and so far, microfiber cloth appears promising (the pink cloth in the picture). I have tested this moderator with over 1500 pellets using my Walther Rotex RM8 in 4.5mm and around 2000 pellets with my Diana Bandit in 5.5mm. To fit this moderator onto a Diana Bandit, you will need to use a thread adapter (available at https://www.thingiverse.com/thing:4305529). Pay close attention to the inside parts and end cap, as there are versions for 4.5mm and 5.5mm pellets. I recommend the following print settings: * To dampen sound effectively, you need mass; print with 100% infill. * Use a 0.15mm layer height for any part with threads and 0.20mm for the rest. In Prusa Slicer, I use the "Quality Preset" and variable layer height for the main tube (0.15mm for threads and 0.25 for the middle section). * Print the main tube with a brim to help it stick to the build plate. The following parts have a 1-layer-thick inside brim to help them stick to the build plate; these need to be removed before use: * Moderator Tube * Chamber 40mm Part A * Chamber 25mm Part A * Cone 10mm Print the following parts for assembly: * 2x Chamber 40mm Part A * 1x Chamber 25mm Part A * 3x Chamber Part B * 1x Cone 10mm * 1x End Cap * 1x Moderator Tube UNF Chamber Part B needs to be glued onto Chamber Part A. Loosely wrap a soft cloth around the Chamber parts, and you may also wrap one or two turns of Teflon tape around each part to close any air gap between the chambers and the main body. Assemble the moderator in the following order for best results: 40mm Chamber, 25mm Chamber, 40mm Chamber, Cone 10mm, End Cap Please let me know if you make your own baffles/inside parts for this moderator, and I will add links to your designs. *EDIT*: Added high polygon count version of main tube.