After several requests for a better trigger from the Sphinx SDP Compact pistols from customers. We finally took action and created a kit that not only makes the Sphinx SDP Compact a better combat pistol but now a contender for competition shooting. Unlike other kits on the market which have poorly made springs to retain safe operation of the firing pin during a drop incident. Our kit redesigns the the springs inside the Sphinx Sub Compact to allow for a proper reduction of hammer spring pressure felt when you pull the trigger, without compromising the safety of the pistol. We recommend you test your ammo with the shim installed and not installed to understand the hardness of your primers. With the shim installed we have had 100% success in firing all rounds we tested including the hardest we have found. With shim removed hardest primers will have issues firing. Trigger pull will be significantly reduces in both SA and DA possible with our kit, finally making it ready for fast accurate shots on target.