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. Features : Black Serrated Front and Rear 7XL Fits Glock 43x/48 with MOS plate and RMRcc GLOCK is a registered trademark of GLOCK Inc. 3CR Tactical is not affiliated with, endorsed by, or sponsored by GLOCK Inc. Any reference to GLOCK products is for identification and compatibility purposes only.