The best inverted trigger mechanism system with easy loading ever designed for SEAC, PICASSO – BASIC, CENTURY thermoplastic handle types. It resolves all utilitarian and technical problems with this mechanism . Easy installation with only a slight modification for the loading cushion using the holding pins and line release as in the original handle. It self-centers and snaps the rod 6.2 cm further back in relation to the classic front mechanism and can accept shafts with extra slots, thereby giving the maximum loading length. It has an excellent line of view once shooting. The design has been thoroughly studied thus offering sensitivity unaffected by load. The trigger has a short pull route and utilizes the best angle and rotation of the trigger resistance as to produce a smooth and unprecedented trigger experience . Included are the line release with metal pin and a form that helps place the mechanism accurately and easily in relation to the configuration of the slot for the line release.The innovative operating system with pushers of the mechanism is patent protected. Any change or modification with respect to the shape, size, dimensions, materials of construction and assembly including a variety of application fields and if it does not include new inventive steps and is not conducive to the technique already known will be considered an aim and aspirations of the present invention. The ideal suggestion to upgrade weapons with type SEAC, ROB ALLEN , PICASSO – BASIC, CENTURY, ASEGAI handle The best system reverse trigger mechanism ever designed for thermoplastic type Seacsub and Picasso Century or Basic handles with loading pad. Installation requires a minor conversion (due to the loading pad). It offers 9,5cm longer loading length relatively to a classical trigger mechanism and has excellent aiming view. The innovating design and patented function offers high sensitivity while the CAM manufactured stainless steel parts ensure its high endurance. Package includes line release.