Feature Designed for Vector Optics Frenzy RD-19II RD-G19II RD-F19II RD-35 RD-40 & Victoptics V3 mini red dot sights, Compatible with Vortex Venom/Viper, Burriss Fastfire 2/3, TRUGLO TRU-TEC, UTG Micro, and Docter footprint red dots. Mini red dot mounting plate for use wth Glock models 17 19 20 21 22 23 24 26 27 29 30 31 32 33 34 35 36 37 38 39 41 43 45 48 Full Metal Specification Distance between 2x2 poles: 40mm (1.57 inch) and 20mm (0.79 inch) Length: 46.1mm (1.8 inch) Thickness: 3mm (0.1 inch) Weight (net): 12g (0.4ounce) High-quality aluminum alloy in durable black matte finish With 2 screws and 1 plate for installation, you need to remove your rear sight first Caution: NOT fit RMR, RMS, Doctor. Realtions