– K14 spring and necessary hardware included
– K14 compatible plunger printed at higher strength
– K14 compatible frontbutt8
– K14 compatible rearbuttR printed at higher strength
– Upwards of 400FPS possible
*Note: All of our Caliburn kits, assembled Caliburns, and replacement plungers are already K14 spring compatible.
***warning, due to high amounts of stress on printed parts, Caliburn lifespan greatly reduced with use of k14 spring and no warranty available.
Original design by captainslug on Thingiverse. Used under proper license.