Vector Optics Sphinx Red Dot Sight Pistol Mount Base M1911 VO Sphinx RDS 6061-T6 Black. 1 in Length: 1.8 in Weight: 0.4 oz Gun Make: 1911 Platform Gun Type: Pistol Finish: Matte Features of Vector Optics Sphinx Red Dot Sight Pistol Mount Base for M1911 Only install onto 1911 pistol Only for specific mini red dot sight such as our SCRA-10A Sphinx Designed for real fire caliber Package Contents: Vector Optics Sphinx Red Dot Sight Pistol Mount Base for M1911 What firearm models does the manufacturer say Vector Optics Sphinx Red Dot Sight Pistol Mount Base for M1911 is compatible with? The manufacturer suggests that Vector Optics Sphinx Red Dot Sight Pistol Mount Base for M1911 is compatible with 1911Vector Optics SCRDM-02: Sphinx Red Dot Sight Pistol Mount Base M1911 VO Sphinx RDS 6061-T6 Black