The Frame Completion Kit offers versatility with three trigger options to suit your preferences. Choose between the economical flat-faced polymer trigger, the curved polymer trigger or upgrade to the premium machined aluminum Elite trigger for a more refined shooting experience. Please note that current production DR/XR models utilize a different Gen5 style slide lock and slide lock spring, which can be found linked here. This comprehensive kit includes everything necessary to fully build a Shadow Systems MR frame or a compact aftermarket frame (G19 size). When ordering, be sure to select between Gen3 or Gen4 options, as the magazine catch varies between these generations. This kit is designed to enhance your firearm build, providing quality components and ease of assembly for a reliable shooting platform.