WILL NOT WORK CORRECTLY ON THE NEW ZENITH CLONE WITHOUT FILING THE FORWARD EARS ON THE SIGHT WELDMENT. IF YOU ARE NOT COMFORTABLE FILING ON YOUR FIREARM, PLEASE DO NOT ORDER. It has come to my attention that the screws shipped with the RMR and SRO are longer than normal, this is causing them to bottom out on the receiver and create an issue with the optic producing a gap at the front of the mount. Please use the mounting screws included with the mount. Will not fit the new PTR with welded pic rail without milling removal of the three rearmost lugs. Does not fit the Holosun 507K.

This specially designed optic base attaches to the rear sight boss on the HK MP5, SP5K as well as most clones and variants. It is not designed to fit airsoft or GSG rimfire models. CNC machined from 7075 bar stock and finished black hardcoat anodize. It will facilitate the Trijicon RMR, SRO and Holosun 507C optic. Mounts optic at a level that when properly zeroed the dot sits perfectly on the front sight blade and inside the globe. Includes US grade 8 mounting screw, (2) US alloy RMR optic screws and hex wrench, US 3mm hex wrench, Loctite 242. and detailed instructions.