The Apex Optic Mount is designed to securely mount the AimpointA(R) Acro(TM) P-1 & P-2 or the Steiner MPS to the GLOCKA(R) MOSA(R) mounting system. The Apex Optic Mount is machined from a billet of steel and black oxide finished. It is manufactured by Apex in the Free State of Arizona. Specifically for use with slides featuring the GlockA(R) MOS cut Securely mount the AimpointA(R) Acro P-1 & P-2 or the Steiner MPS to the GLOCKA(R) MOSA(R) slide Mounting screws included in the package Mounts directly to the factory MOS slide Apex recommends the slide be cleaned before the mount is installed and the screws be torqued to 15 in-lb Mfg: Apex Tactical Specialties Inc