This is a short video which follows on from my previous FX crown mk2 video, after some experimentation i found a slug that groups reasonably good out of my 600mm superior liner. i did also previously fit a slug power kit but i found that the 26g tungsten hammer weight was to much for the crown and upon winding up the hammer spring tension i also found that the sear chewed up the factory hammer, i then replaced the factory hammer with a new slightly heavier and redesigned fx hammer that i bought from bagnall and kirkwood in the uk.