This Flat Face FX Trigger Shoe is a direct replacement for the factory curved trigger shoe. Included with the shoe is a M3 x 3mm set screw to secure it on any FX factory trigger stem. Many shooters find that a flat faced trigger results in a more uniform trigger feel and lighter felt trigger pull. The AirMarksman Flat Faced Trigger Shoe is available in 3 color options: Black, Gold, or AirMarksman Blue adding an extra touch of style to any FX Airgun.