Glock Models 17, 17L, 19, 22, 23, 24, 25, 31, 32, 33, 34, 35, 36, 37, 38, 39:

Fixed Sights	FT Bullseye
microRDS	FT Two Dot
R4E	FT Single Dot

Glock Models 21, 29, 30, 36, 40, 41, 20:

Fixed Sights	FT Bullseye
microRDS	FT Two Dot
R4E	FT Single Dot

Glock Models 26, 27, 28:

Fixed Sights	FT Bullseye
microRDS	FT Two Dot
R4E	FT Single Dot

Glock Models 42, 43, 48:

Fixed Sights	FT Bullseye
microRDS	FT Two Dot
R4E	FT Single Dot

Glock MOS configuration:

microRDS	FT Bullseye