Glock 17 Gen 5 MOS. It currently has a Trijicon RMR on it as well as Trijicon supper height night sights. I built this gun as a home defense gun. The RMR is sitting on a Steel Forward Controls Group optic plate as well as their sealing plate to keep water out of the battery. The optic is held on with steel screws from FCG as well. I have the original box and doc’s for the gun, as well as the RMR and all parts. Must have a CCW permit for me to sell to you. Might consider selling rmr separate from pistol. X300u is not for sale.