I bought a plain jane DPMS Ar to bounce around in the truck on the farm for my dad. My question is does anyone know where I can get a set of open sights for it. I am looking for open sights like what come on regular rifles and pistols. Would prefer them in fiber optic if possible. Any where that I can order them or someone that can make them would be extremely helpful. I am located in northwest indiana but willing to drive to have them made if need be. Thank you in advance.