Foam Knight Rx - Minimal Hardware

prusaprinters

<p>I remixed the wonderful Foam Knight RX <a href="https://www.thingiverse.com/thing:4861137">https://www.thingiverse.com/thing:4861137</a> and made it use less hardware so that I could self source. And for fun. I changed all the screws to M3 type, as I have a LOT of them from 3d printer builds. Although I had to keep the 6-32 square nuts, I could not find a metric replacement for those after many tests.</p><p>I still recommend that you buy the official hardware kit! I am sure it would shoot much faster.</p><p>Changes:</p><ul><li>Added dowel, plunger tube, barrel as 3d printed parts. Hope your printer is tuned really well! Make sure to do flow calibration with your filament.</li><li>The RR Logo from the photos is not in the final model here.</li><li>Added grip scales to make it more comfortable.</li><li>Widened trigger for comfort as well.</li><li>Eliminated required 907 O-Ring</li><li>8-32 ½" → M3*12mm</li><li>8-32 7/8" → M3*25mm SOCKET HEAD! (must not be button head)</li><li>8-32 square nut, 8-32 hex nuts → M3 hex nuts</li><li>6-32 ¼" → M3*6mm button head (use thread locker on these)</li><li>8-32 2" → M3*50mm</li><li>6-32 3/8" → M3*8mm</li><li>6-32 1" → M3*25mm</li></ul><p>So the only hardware beyond the M3 screws is (2x) 123 Buna O-Ring, a larger Main Spring and smaller Utility spring (I got a pack of springs for $5 from home depot). Some grease for the O-Rings.</p><p>Works great printed in PLA with no supports. I did print the grip scales in color changing ABS and acetone smoothed them.</p>