AmeriGlo Optic Compatible Sight Set, Fits all Glocks, Cowitnesses with Glock 43X/48 MOS, Black Serrated Front and Rear GL-527 AmeriGlo suppressor height sets provide an elevated sight picture" able to co-witness with slide-mounted miniature red dot optics and suppressors. For more information on how to choose the correct height set for your suppressor or optic" visit the AmeriGlo website" under the INFO tab.