UM TACTICAL Delrin Shim 1.0 Degree for Vortex Venom & Viper Burris Fastfire II III Docters and Sightmark Optics
- Delrin Shims are made to fit between the Burris Fastfire red dot and the mount. Fits.
- Burris Fastfire II, III, Docter Red Dot Sight & Insight MRDS.