ok, ive been thinking about this and im not sure exactly what a sear gun is. i mean i know its i gun with a dropin auto sear, but is it select fire? i would think you drop in a auto sear and its on and off. theres no select fire switch. it would be obvious that an original MG or MG reciever would have the select fire switch. and what exactly is a lightning link. thanks. i gotta win the lottery or something so i can get one of thses things.