What it is:
Hardware Kit for the Lynx, a bullpup half dart blaster designed by Dan at Orion Blasters. This kit includes all hardware necessary to combine with your own 3D printed parts to build a fully functional blaster! comes with a 15.5-inch barrel & SF25-TC spring.
the SF25-TC is around 220 fps depending on your setup
Orion Blasters is the designer of the files and BOM, Silver Fox industries is the maker of this hardware kit.