The TRUGLO Dot Optic Mount allows you to add your Trijicon RMR Red Dot Sight to your Ruger 10/22. No need to find a picatinny rail mount, then another mount for your sight, this mounts directly to your receiver. FeaturesMount a dot-optic on drilled and tapped Ruger 10/22 receiversDoes not require a Picatinny / Weaver-style railMounting hardware and tools includedAllows optic to sit low on the receiverLightweight, compact design