A trigger assembly group for use in firearms is disclosed. The trigger assembly group comprises a primary trigger connected to a secondary trigger that is arranged and configured to reduce the incidence of accidental discharge caused by inadvertently rearwardly actuating a primary trigger. The disclosed primary trigger and secondary trigger are arranged and configured for linear movement within a housing. The secondary trigger includes locking wing members that move from engagement with upper locking housing grooves to lower housing grooves. The disclosed trigger assembly group further includes a trigger shoe connected to the primary trigger, wherein the trigger shoe comprises a channel formed therein. A lower portion of the secondary trigger is configured to move from a forwardmost position, extending outwardly from the front face of the trigger shoe, to a rearmost position in which the lower portion of the secondary trigger recedes into the channel of the trigger shoe.