Expert Series PRO-SHOT ACP TRIGGER. Adjustable from one to two stage configurations. Consistent 3lb trigger pull with no creep. Frictionless Roller Catch Technology eliminates any grit from sear and catch Silent manual safety Improves accuracy and consistency Does not void warranty Fits most Excalibur CrossbowsStandard- EXP73613 (fits Micro 308 Short/315/335/355, Matrix 310/330/355/380/405/Sapphire, Phoenix/Vixen/Exocet 200/Exomax/Relayer Y25/Offspring) Bullpup- EXP73614 (fits Micro Suppressor, Matrix Bulldog 330/380/400) * Does not fit Grizzly, GRZ2, G340, Axiom SMF, Ibex SMF, Matrix Cub, Matrix Sapphire, Equinox, Eclipse XT or Vortex To use the Pro-Shot trigger with the older Exo series models the new #2006 scope mount also needs to be purchased to allow relocation of the arrow hold down spring from the trigger to the scope mount