TYPE A suitable for - Sig Sauer Romeo1, Burris FastFire 2,3, Vortex Viper, Vortex Venom, EOTech MRDS, Leupold Delta Point Pro, JPoint RMD, Shield SMS/RMS.
TYPE B suitable for - Toni System ZR-4, Toni System ZR-6, Toni System ZR-8, C-More RTS2/STS2, Benthley TSX6, Vortex Razor, Sig Sauer Romeo3, Meopta MeoRed/MeoSight III, Trijicon RMR-SRO, Holosun HS 407-507C